Environmental impact of wind power

Livestock grazing near a wind turbine.[1]

The environmental impact of wind power, when compared to the environmental impacts of fossil fuels, is relatively minor. According to the IPCC, in assessments of the life-cycle global warming potential of energy sources, wind turbines have a median value of between 12 and 11 (gCO2eq/kWh) depending, respectively, on whether offshore or onshore turbines are being assessed.[2][3] Compared with other low carbon power sources, wind turbines have some of the lowest global warming potential per unit of electrical energy generated.[4]

While a wind farm may cover a large area of land, many land uses such as agriculture are compatible with it, as only small areas of turbine foundations and infrastructure are made unavailable for use.[5][6]

There are reports of bird and bat mortality at wind turbines as there are around other artificial structures. The scale of the ecological impact may[7] or may not[8] be significant, depending on specific circumstances. Prevention and mitigation of wildlife fatalities, and protection of peat bogs affect the siting and operation of wind turbines; wind farms built on peatland have resulted in environmental damage due to loss of these natural carbon sinks.[9][10][11]


There are anecdotal reports of negative health effects from noise on people who live very close to wind turbines.[12] Peer-reviewed research has generally not supported these claims.[13][14][15] Although research on livestock suggests that close proximity to wind turbines does increase blood cortisol stress levels.[16]

Wind turbines have been criticised as having a visual impact on the landscape. When conflicts arise the arguments often centre on the scenic and heritage values of a landscape.

Basic operational considerations

Net energy gain

Modern wind turbine systems have a net energy gain, in other words during their service life they produce more energy than is used to build the system. Any practical large-scale energy source must produce more energy than is used in its construction. The energy return on investment (EROI) for wind energy is equal to the cumulative electricity generated divided by the cumulative primary energy required to build and maintain a turbine. According to a meta study, in which all existing studies from 1977 to 2007 were reviewed, the EROI for wind ranges from 5 to 35,[17] with the most common turbines in the range of 2 MW nameplate capacity-rotor diameters of 66 meters, the EROI is on average 16.[18][19] EROI is strongly proportional to turbine size, and larger late-generation turbines average at the high end of this range, at or above 35. Since energy produced is several times energy consumed in construction, there is a net energy gain.[17] Wind turbine manufacturer Vestas claims that initial energy "pay back" is within about 7–9 months of operation for a 1.65-2.0MW wind power plant under low wind conditions,[20][21] whereas Siemens Wind Power calculates 5–10 months depending on circumstances.[22]

Pollution & effects on the grid

Pollution costs

Wind power consumes no water[23] for continuing operation, and has near negligible emissions directly related to its electricity production. In full life cycle assessments(LCAs), Wind turbines when isolated from the electric grid produce negligible amounts of carbon dioxide, carbon monoxide, sulfur dioxide, nitrogen dioxide, mercury and radioactive waste when in operation, unlike fossil fuel sources and nuclear energy station fuel production, respectively. However, while they produce none in operation, during construction, wind turbines do produce slightly more particulate matter(PM), a form of air pollution, at a rate per unit of energy generated(kWh) higher than a fossil gas electricity station("NGCC"),[24][25] and also more heavy metals and PM than nuclear stations per unit of energy generated.[26][27] As far as total pollution costs in economic terms, in a comprehensive 2006 European study, alpine Hydropower was found to exhibit the lowest external pollution, or externality, costs of all electricity generating systems, below 0.05 c€/kWh. Wind power externality costs were found to be 0.09 - 0.12c€/kW, while nuclear energy had a 0.19 c€/kWh value and fossil fuels generated 1.6 - 5.8 c€/kWh of downstream costs.[28] With the exception of the latter fossil fuels, these are negligible costs in comparison to the cost of electricity production, which is approximately 10 c€/kWh in European countries.

Findings when connected to the grid

The Vattenfall utility company study found Hydroelectric, nuclear stations and wind turbines to have far less greenhouse emissions than other sources represented.

A typical study of a wind farms Life cycle assessment, when not connected to the electric grid, usually results in similar findings as the following 2006 analysis of 3 installations in the US Midwest, where the carbon dioxide(co2) emissions of wind power ranged from 14 to 33 tonnes (15 to 36 short tons) per GWh(14 - 33 gCO2/kWh) of energy produced, with most of the CO2 emission intensity coming from producing the concrete for wind-turbine foundations.[29] By combining similar data from numerous individual studies in a meta-analysis, the median global warming potential for wind power was found to be 11-12g CO2/kWh and unlikely to change significantly.[30][2][31]

However these relatively low pollution values begin to increase as greater and greater wind energy is added to the grid, or wind power 'electric grid penetration' levels are reached. Due to the effects of attempting to balance out the energy demands on the grid, from Intermittent power sources e.g. wind power(sources which have low capacity factors due to the weather), this either requires the construction of large energy storage projects, which have their own emission intensity which must be added to wind power's system-wide pollution effects, or it requires more frequent reliance on fossil fuels than the spinning reserve requirements necessary to back up more dependable sources. With the latter combination presently being the more common.[32][33][34]

This higher dependence on back-up/Load following power plants to ensure a steady power grid output has the knock-on-effect of more frequent inefficient(in CO2e g/kWh) throttling up and down of these other power sources in the grid to facilitate the intermittent power source's variable output. When one includes the total effect of intermittent sources on other power sources in the grid system, that is, including these inefficient start up emissions of backup power sources to cater for wind energy, into wind energy's total system wide life cycle, this results in a higher real-world wind energy emission intensity. Higher than the direct g/kWh value that is determined from looking at the power source in isolation and thus ignores all down-stream detrimental/inefficiency effects it has on the grid. This higher dependence on back-up/Load following power plants to ensure a steady power grid output forces fossil power plants to operate in less efficient states. In a 2012 paper that appeared in the Journal of Industrial Ecology it states.[30]

"The thermal efficiency of fossil-based power plants is reduced when operated at fluctuating and suboptimal loads to supplement wind power, which may degrade, to a certain extent, the GHG(Greenhouse gas) benefits resulting from the addition of wind to the grid. A study conducted by Pehnt and colleagues (2008) reports that a moderate level of [grid] wind penetration (12%) would result in efficiency penalties of 3% to 8%, depending on the type of conventional power plant considered. Gross and colleagues (2006) report similar results, with efficiency penalties ranging from nearly 0% to 7% for up to 20% [of grid] wind penetration. Pehnt and colleagues (2008) conclude that the results of adding offshore wind power in Germany on the background power systems maintaining a level supply to the grid and providing enough reserve capacity amount to adding between 20 and 80 g CO2-eq/kWh to the life cycle GHG emissions profile of wind power."'

In comparison to other low carbon power sources Wind turbines, when assessed in isolation, have a median life cycle emission value of between 12 and 11 (gCO2eq/kWh). While the more dependable alpine Hydropower and nuclear stations have median total life cycle emission values of 24 and 12 g CO2-eq/kWh respectively.[2][35]

While an increase in emissions due to grid connection is an issue, Pehnt et. al still conclude that these 20 and 80 g CO2-eq/kWh added penalties still result in wind being roughly ten times less polluting than fossil gas and coal which emit ~400 and 900 g CO2-eq/kWh respectively.[36]

However, as these losses occur due to cycling of fossil power plants, they become smaller when more renewables are added to the power system and fossil power plants are replaced by renewables. Consequently also the emissions of the renewables drop with the progressing energy transition.[37]

Rare-earth use

The production of permanent magnets used in some wind turbines makes use of neodymium.[38][39] Primarily exported by China, pollution concerns associated with the extraction of this rare-earth element have prompted government action in recent years,[40][41] and international research attempts to refine the extraction process.[42] Research is underway on turbine and generator designs which reduce the need for neodymium, or eliminate the use of rare-earth metals altogether.[43] Additionally, the large wind turbine manufacturer Enercon GmbH chose very early not to use permanent magnets for its direct drive turbines, in order to avoid responsibility for the adverse environmental impact of rare earth mining.[44]

Ecology

Land use

Wind farms are often built on land that has already been impacted by land clearing. The vegetation clearing and ground disturbance required for wind farms is minimal compared with coal mines and coal-fired power stations. If wind farms are decommissioned, the landscape can be returned to its previous condition.[45]

A study by the US National Renewable Energy Laboratory of US wind farms built between 2000 and 2009 found that, on average, only 1.1 percent of the total wind farm area suffered surface disturbance, and only 0.43 percent was permanently disturbed by wind power installations. On average, there were 63 hectares (156 acres) of total wind farm area per MW of capacity, but only 0.27 hectares (0.67 acres) of permanently disturbed area per MW of wind power capacity.[46]

In the UK many prime wind farm sites - locations with the best average wind speeds - are in upland areas which are frequently covered by blanket bog. This type of habitat exists in areas of relatively high rainfall where large areas of land remain permanently sodden. Construction work may create a risk of disruption to peatland hydrology which could cause localised areas of peat within the area of a wind farm to dry out, disintegrate, and so release their stored carbon. At the same time, the warming climate which renewable energy schemes seek to mitigate could itself pose an existential threat to peatlands throughout the UK.[47][48] A Scottish MEP campaigned for a moratorium on wind developments on peatlands saying that "Damaging the peat causes the release of more carbon dioxide than wind farms save".[49] A 2014 report for the Northern Ireland Environment Agency noted that siting wind turbines on peatland could release considerable carbon dioxide from the peat, and also damage the peatland contributions to flood control and water quality: “The potential knock-on effects of using the peatland resource for wind turbines are considerable and it is arguable that the impacts on this facet of biodiversity will have the most noticeable and greatest financial implications for Northern Ireland.”[50]

Farmers and graziers often lease land to companies building wind farms. In the U.S., landowners may receive annual lease payments of two thousand to five thousand dollars per turbine.[51] In 2011, taxes, fees, and assessments of wind power facilities enabled Sherman County, Oregon to pay each landowner $590 per year "...to reward residents who have made no financial gains [directly] from wind energy development, but whose views of... [the] landscape now include a panorama of turbines".[52]

Wind-energy advocates contend that less than 1% of the land is used for foundations and access roads, the other 99% can still be used for farming.[6] A wind turbine needs about 200–400 m² for the foundation. A (small) 500-kW-turbine with an annual production of 1.4 GWh produces 11.7 MWh/m², which is comparable with coal-fired plants (about 15-20 MWh/m²), coal-mining not included. With increasing size of the wind turbine the relative size of the foundation decreases.[53] Critics point out that on some locations in forests the clearing of trees around tower bases may be necessary for installation sites on mountain ridges, such as in the northeastern U.S.[54] This usually takes the clearing of 5,000 m² per wind turbine.[55]

Turbines are not generally installed in urban areas. Buildings interfere with wind, turbines must be sited a safe distance ("setback") from residences in case of failure, and the value of land is high. There are a few notable exceptions to this. The WindShare ExPlace wind turbine was erected in December 2002, on the grounds of Exhibition Place, in Toronto, Canada. It was the first wind turbine installed in a major North American urban city centre.[56] Steel Winds also has a 20 MW urban project south of Buffalo, New York. Both of these projects are in urban locations, but benefit from being on uninhabited lake shore property.

Livestock

The land can still be used for farming and cattle grazing. Livestock are unaffected by the presence of wind farms. International experience shows that livestock will "graze right up to the base of wind turbines and often use them as rubbing posts or for shade".[45]

In 2014, a first of its kind Veterinary study attempted to determine the effects of rearing livestock near a wind turbine, the study compared the health effects of a wind turbine on the development of two groups of growing geese, preliminary results found that geese raised within 50 meters of a wind turbine gained less weight and had a higher concentration of the stress hormone cortisol in their blood than geese at a distance of 500 meters.[16]

Semi-domestic reindeer avoid the construction activity,[57] but seem unaffected when the turbines are operating.[58][59]

Impact on wildlife

Environmental assessments are routinely carried out for wind farm proposals, and potential impacts on the local environment (e.g. plants, animals, soils) are evaluated.[45] Turbine locations and operations are often modified as part of the approval process to avoid or minimise impacts on threatened species and their habitats. Any unavoidable impacts can be offset with conservation improvements of similar ecosystems which are unaffected by the proposal.[45]

A research agenda from a coalition of researchers from universities, industry, and government, supported by the Atkinson Center for a Sustainable Future, suggests modeling the spatiotemporal patterns of migratory and residential wildlife with respect to geographic features and weather, to provide a basis for science-based decisions about where to site new wind projects. More specifically, it suggests:

Birds

Data largely from a preliminary study,[61] into causes of avian mortality in the United States, annual
Source Estimated
mortality
(in millions) 		Estimated
deaths
(per GWh)
Wind turbines[62][63][64] 0.02 – 0.57 0.269
Aircraft[65] 0.08 (n/a)
Nuclear power plants[62][61] 0.33 – 0 0.416 – 0
Oilfield oil waste & waste water pits[66][67] 0.50 – 1 (n/a)
Nuisance bird control kills (airports, agriculture, etc...)[68] 2 (n/a)
Communication towers (cellular, radio, microwave)[62] 4 – 50 (n/a)
Large communications towers (over 180', N. America)[69] 6.8 (n/a)
Fossil fuel powerplants[62] 14 5.18
Cars & trucks[62][68] 50 – 100 (n/a)
Agriculture[62] 67 (n/a)
Pesticide use[62] 72 (n/a)
Hunting[62][68] 100 – 120 (n/a)
Transmission lines (conventional powerplants)[62][68] 174 – 175 (n/a)
Buildings and windows[70] 365 – 988 (n/a)
Domestic and feral cats[62][71][72][73] 210 – 3,700 (n/a)

The impact of wind energy on birds, which can fly into turbines directly, or indirectly have their habitats degraded by wind development, is complex. Projects such as the Black Law Wind Farm have received wide recognition for its contribution to environmental objectives, including praise from the Royal Society for the Protection of Birds, who describe the scheme as both improving the landscape of a derelict opencast mining site and also benefiting a range of wildlife in the area, with an extensive habitat management projects covering over 14 square kilometres.[74]

The preliminary data,[61] from the above table during 2013, 'Causes of avian mortality in the United States, annual', shown as a bar graph.

The meta-analysis on avian mortality by Benjamin K. Sovacool led him to suggest that there were a number of deficiencies in other researchers' methodologies.[62] Among them, he stated were a focus on bird deaths, but not on the reductions in bird births: for example, mining activities for fossil fuels and pollution from fossil fuel plants have led to significant toxic deposits and acid rain that have damaged or poisoned many nesting and feeding grounds, leading to reductions in births. The large cumulated footprint of wind turbines, which reduces the area available to wildlife or agriculture, is also missing from all studies including Sovacool's. Many of the studies also made no mention of avian deaths per unit of electricity produced, which excluded meaningful comparisons between different energy sources. More importantly, it concluded, the most visible impacts of a technology, as measured by media exposure, are not necessarily the most flagrant ones.[62]

The Sovacool study did a broad assessment of anthropogenic causes of avian mortality and brought together many studies on deaths due to wind energy, fossil fuel energy and nuclear energy. He estimated a figure for bird deaths due to wind power of 0.269 fatalities per gigawatt-hour (GWh), by which he extrapolated a total of 7193 US bird fatalities in 2006. He concluded that wind farms and nuclear power stations are responsible each for between 0.3 and 0.4 fatalities per gigawatt-hour (GWh) of electricity while fossil-fueled power stations are responsible for about 5.2 fatalities per GWh. Of the bird deaths Sovacool attributed to fossil-fuel power plants, 96 percent were due to the effects of climate change. While the study did not assess bat mortality due to various forms of energy, he considered it not unreasonable to assume a similar ratio of mortality.[62][75] The Sovacool study has provoked controversy because of its treatment of data.[76][77] In a series of replies, Sovacool acknowledged a number of large errors, particularly those that relate to his earlier "0.33 to 0.416" fatalities overestimate for the number of bird deaths per GWh of nuclear power, and cautioned that "the study already tells you the numbers are very rough estimates that need to be improved."[61]

Sovacool estimated that in the United States wind turbines kill between 20,000 and 573,000 birds per year, and although he states either figure is minimal compared to bird deaths from other causes. He uses the lower 20,000 figure in his study and table (see Causes of avian mortality table). Fossil-fueled power plants, which wind turbines generally require to make up for their weather dependent intermittency, kill almost 20 times as many birds per gigawatt hour (GWh) of electricity. Bird deaths due to other human activities and cats total between 797 million and 5.29 billion per year in the U.S. Additionally, while many studies concentrate on the analysis of bird deaths, few have been conducted on the reductions of bird births, which are the additional consequences of the various pollution sources that wind power partially mitigates.[62]

A 2013 meta-analysis by Smallwood identified a number of factors which result in serious under-reporting of bird and bat deaths by wind turbines. These include inefficient searches, inadequate search radius, and carcass removal by predators. To adjust the results of different studies, he applied correction factors from hundreds of carcass placement trials. His meta-analysis concluded that in 2012 in the United States, wind turbines resulted in the deaths of 888,000 bats and 573,000 birds, including 83,000 birds of prey.[78]

Also in 2013, a meta-analysis by Lossa and others in the journal Biological Conservation found that the likely mean number of birds killed annually in the U.S by wind turbines was 234,000. The authors acknowledged the larger number reported by Smallwood, but noted that Smallwood’s meta-analysis did not distinguish between types of wind turbine towers; older wind turbines were more often on lattice towers, which attract birds. The monopole towers used almost exclusively for new wind installations appear to result in fewer bird deaths.[79][80]

Bird mortality at wind energy facilities can vary greatly depending on the location, construction, and height, with some facilities reporting zero bird fatalities, and others as high as 9.33 birds per turbine per year.[81] A 2007 article in the journal Nature stated that each wind turbine in the U.S. kills an average of 0.03 birds per year, and recommends that more research needs to be done.[82][83]

A comprehensive study of wind turbine bird deaths by the Canadian Wildlife Service in 2013 analyzed reports from 43 out of the 135 wind farms operating across Canada as of December 2011. After adjusting for search inefficiencies, the study found an average of 8.2 bird deaths per tower per year, from which they arrived at a total of 23,000 per year for Canada at that time. Actual habitat loss averaged 1.23 hectares per turbine, which involved the direct loss of, on average, 1.9 nesting sites per turbine. The effective habitat loss, which was not quantified, was observed to be highly variable between species: some species avoided nesting within 100 to 200 m from turbines, while other species were observed feeding on the ground directly under the blades. The study concluded that, overall, the combined effect on birds was “relatively small” compared to other causes of bird mortality, but noted that mitigation measures might be required in some situations to protect at-risk species.[84]

Wind facilities have attracted the most attention for impacts on iconic raptor species, including golden eagles. The Pine Tree Wind energy project near Tehachapi, California has one of the highest raptor mortality rates in the country; by 2012 at least eight golden eagles had been killed according to the U.S. Fish and Wildlife Service (USFWS).[85] Biologists have noted that it is more important to avoid losses of large birds as they have lower breeding rates and can be more severely impacted by wind turbines in certain areas.

Large numbers of bird deaths are also attributed to collisions with buildings.[86] An estimated 1 to 9 million birds are killed every year by tall buildings in Toronto, Canada alone, according to the wildlife conservation organization Fatal Light Awareness Program.[87][88] Other studies have stated that 57 million are killed by cars, and some 365 to 988 million are killed by collisions with buildings and plate glass in the United States alone.[70][83][89] Promotional event lightbeams as well as ceilometers used at airport weather offices can be particularly deadly for birds,[90] as birds become caught in their lightbeams and suffer exhaustion and collisions with other birds. In the worst recorded ceilometer lightbeam kill-off during one night in 1954, approximately 50,000 birds from 53 different species died at the Warner Robins Air Force Base in the United States.[91]

Arctic terns and a wind turbine at the Eider Barrage in Germany.

In the United Kingdom, the Royal Society for the Protection of Birds (RSPB) concluded that "The available evidence suggests that appropriately positioned wind farms do not pose a significant hazard for birds."[8] It notes that climate change poses a much more significant threat to wildlife, and therefore supports wind farms and other forms of renewable energy as a way to mitigate future damage. In 2009 the RSPB warned that "numbers of several breeding birds of high conservation concern are reduced close to wind turbines" probably because "birds may use areas close to the turbines less often than would be expected, potentially reducing the wildlife carrying capacity of an area.[92]

Concerns have been expressed that wind turbines at Smøla, Norway are having a deleterious effect on the population of white-tailed eagles, Europe's largest bird of prey. They have been the subject of an extensive re-introduction programme in Scotland, which could be jeopardised by the expansion of wind turbines.[93]

The Peñascal Wind Power Project in Texas is located in the middle of a major bird migration route, and the wind farm uses avian radar originally developed for NASA and the United States Air Force to detect birds as far as 4 miles (6.4 km) away. If the system determines that the birds are in danger of running into the rotating blades, the turbines shut down and are restarted when the birds have passed.[94] A 2005 Danish study used surveillance radar to track migrating birds traveling around and through an offshore wind farm. Less than 1% of migrating birds passing through an offshore wind farm in Rønde, Denmark, got close enough to be at risk of collision, though the site was studied only during low-wind conditions. The study suggests that migrating birds may avoid large turbines, at least in the low-wind conditions the research was conducted in.[95][96]

Old style wind turbines at Altamont Pass in California, which are being replaced by more bird-friendly designs

In 2012, researchers reported that, based on their four-year radar tracking study of birds after construction of an offshore wind farm near Lincolnshire, that pink-footed geese migrating to the U.K. to overwinter altered their flight path to avoid the turbines.[97]

At the Altamont Pass Wind Farm in California, a settlement between the Audubon Society, Californians for Renewable Energy and NextEra Energy Resources who operate some 5,000 turbines in the area requires the latter to replace nearly half of the smaller turbines with newer, more bird-friendly models by 2015 and provide $2.5 million for raptor habitat restoration.[98] The proposed Chokecherry and Sierra Madre Wind project in Wyoming, however, is expected to kill nearly 5,400 birds each year, including over 150 raptors, according to a Bureau of Land Management environmental analysis.[99]

Bats

Bats may be injured by direct impact with turbine blades, towers, or transmission lines. Recent research shows that bats may also be killed when suddenly passing through a low air pressure region surrounding the turbine blade tips.[75]

The numbers of bats killed by existing onshore and near-shore facilities have troubled bat enthusiasts.[100]

In April 2009 the Bats and Wind Energy Cooperative released initial study results showing a 73% drop in bat fatalities when wind farm operations are stopped during low wind conditions, when bats are most active.[101] Bats avoid radar transmitters, and placing microwave transmitters on wind turbine towers may reduce the number of bat collisions.[102][103]

A 2013 study produced an estimate that wind turbines killed more than 600,000 bats in the U.S. the previous year, with the greatest mortality occurring in the Appalachian Mountains. Some earlier studies had produced estimates of between 33,000 and 888,000 bat deaths per year.[104]

Weather and climate change

Wind farms may affect weather in their immediate vicinity. This turbulence from spinning wind turbine rotors increases vertical mixing of heat and water vapor that affects the meteorological conditions downwind. Overall, wind farms lead to a slight warming at night and a slight cooling during the day time. This effect can be reduced by using more efficient rotors or placing wind farms in regions with high natural turbulence. Warming at night could "benefit agriculture by decreasing frost damage and extending the growing season. Many farmers already do this with air circulators".[105][106][107]

A number of studies have used climate models to study the effect of extremely large wind farms. One study reports simulations that show detectable changes in global climate for very high wind farm usage, on the order of 10% of the world's land area. Wind power has a negligible effect on global mean surface temperature, and it would deliver "enormous global benefits by reducing emissions of CO2 and air pollutants".[108] Another peer-reviewed study suggested that using wind turbines to meet 10 percent of global energy demand in 2100 could actually have a warming effect, causing temperatures to rise by 1 °C (1.8 °F) in the regions on land where the wind farms are installed, including a smaller increase in areas beyond those regions. This is due to the effect of wind turbines on both horizontal and vertical atmospheric circulation. Whilst turbines installed in water would have a cooling effect, the net impact on global surface temperatures would be an increase of 0.15 °C (0.27 °F). Author Ron Prinn cautioned against interpreting the study "as an argument against wind power, urging that it be used to guide future research". "We’re not pessimistic about wind," he said. "We haven’t absolutely proven this effect, and we’d rather see that people do further research".[109]

Impacts on people

Aesthetics

The surroundings of Mont Saint-Michel at low tide. While windy coasts are good locations for wind farms, aesthetic considerations may preclude such developments in order to preserve historic views of cultural sites.

Aesthetic considerations of wind power stations have often a significant role in their evaluation process.[110] To some, the perceived aesthetic aspects of wind power stations may conflict with the protection of historical sites.[111] Wind power stations are less likely to be perceived negatively in urbanized and industrial regions.[112] Aesthetic issues are subjective and some people find wind farms pleasant or see them as symbols of energy independence and local prosperity.[113] While studies in Scotland predict wind farms will damage tourism,[114] in other countries some wind farms have themselves become tourist attractions,[115][116][117] with several having visitor centers at ground level or even observation decks atop turbine towers.

In the 1980s, wind energy was being discussed as part of a soft energy path.[118] Renewable energy commercialization led to an increasing industrial image of wind power, which is being criticized by various stakeholders in the planning process, including nature protection associations.[119] Newer wind farms have larger, more widely spaced turbines, and have a less cluttered appearance than older installations. Wind farms are often built on land that has already been impacted by land clearing and they coexist easily with other land uses.

Coastal areas and areas of higher altitude such as ridgelines are considered prime for wind farms, due to constant wind speeds. However, both locations tend to be areas of high visual impact and can be a contributing factor in local communities' resistance to some projects. Both the proximity to densely populated areas and the necessary wind speeds make coastal locations ideal for wind farms.[120]

Loreley rock in Rhineland-Palatinate, part of UNESCO World heritage site Rhine Gorge

Wind power stations can impact on important sight relations which are a key part of culturally important landscapes, such as in the Rhine Gorge or Moselle valley.[121] Conflicts between heritage status of certain areas and wind power projects have arisen in various countries. In 2011 UNESCO raised concerns regarding a proposed wind farm 17 kilometres away from the French island abbey of Mont-Saint-Michel.[122] In Germany, the impact of wind farms on valuable cultural landscapes has implications on zoning and land-use planning.[121][123] For example, sensitive parts of the Moselle valley and the background of the Hambach Castle, according to the plans of the state government, will be kept free of wind turbines.[124]

Wind turbines require aircraft warning lights, which may create light pollution. Complaints about these lights have caused the US FAA to consider allowing fewer lights per turbine in certain areas.[125] Residents near turbines may complain of "shadow flicker" caused by rotating turbine blades, when the sun passes behind the turbine. This can be avoided by locating the wind farm to avoid unacceptable shadow flicker, or by turning the turbine off for the time of the day when the sun is at the angle that causes flicker. If a turbine is poorly sited and adjacent to many homes, the duration of shadow flicker on a neighbourhood can last hours.[126]

Wind turbine syndrome

Main article: Wind turbine syndrome

Wind turbine syndrome is a psychosomatic disorder largely caused by anxiety about wind farms and not by the turbines themselves. There is limited evidence of anxiety effects caused by low level noise in the close vicinity of the turbines.[127]

Safety

Some turbine nacelle fires cannot be extinguished because of their height, and are sometimes left to burn themselves out. In such cases they generate toxic fumes and can cause secondary fires below.[128] However, newer wind turbines are built with automatic fire extinguishing systems similar to those provided for jet aircraft engines. These autonomous systems, which can be retrofitted to older wind turbines, automatically detect a fire, order the shut down of the turbine unit and immediately extinguish the fires completely.[129][130][131][132][133]

During winter ice may form on turbine blades and subsequently be thrown off during operation. This is a potential safety hazard, and has led to localised shut-downs of turbines.[134] Modern turbines can detect ice formation and excess vibration during operations, and are shut down automatically. Electronic controllers and safety sub-systems monitor many aspects of the turbine, generator, tower, and environment to determine if the turbine is operating in a safe manner within prescribed limits. These systems can temporarily shut down the turbine due to high wind, ice, electrical load imbalance, vibration, and other problems. Recurring or significant problems cause a system lockout and notify an engineer for inspection and repair. In addition, most systems include multiple passive safety systems that stop operation even if the electronic controller fails. A 2007 study noted that no insurance claims had been filed, either in Europe or the US, for injuries from ice falling from wind towers, and that while some fatal accidents have occurred to industry workers, only one wind-tower related fatality was known to occur to a non-industry person: a parachutist.[135]

Offshore

Many offshore wind farms have contributed to electricity needs in Europe and Asia for years, and as of 2014 the first offshore wind farms are under development in U.S. waters. While the offshore wind industry has grown dramatically over the last several decades, especially in Europe, there is still some uncertainty associated with how the construction and operation of these wind farms affect marine animals and the marine environment.[136]

Traditional offshore wind turbines are attached to the seabed in shallower waters within the near-shore marine environment. As offshore wind technologies become more advanced, floating structures have begun to be used in deeper waters where more wind resources exist.

Common environmental concerns associated with offshore wind developments include:[137]

Due to the landscape protection status of large areas of the Wadden Sea, a major World Heritage Site with various national parks (e.g. Lower Saxon Wadden Sea National Park) German offshore installations are mostly restricted on areas outside the territorial waters.[138] Offshore capacity in Germany is therefore way behind the British or Danish near coast installments, which face much lower restrictions.

In January 2009, a comprehensive government environmental study of coastal waters in the United Kingdom concluded that there is scope for between 5,000 and 7,000 offshore wind turbines to be installed without an adverse impact on the marine environment. The study—which forms part of the Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment—is based on more than a year's research. It included analysis of seabed geology, as well as surveys of sea birds and marine mammals.[139][140] There does not seem to have been much consideration however of the likely impact of displacement of fishing activities from traditional fishing grounds.[141]

A study published in 2014 suggests that some seals prefer to hunt near turbines, likely due to the laid stones functioning as artificial reefs which attract invertebrates and fish.[142] However, studies of the impacts of dredging on complex soft sediment communities suggest that the impacts caused by construction of structures such as windfarms may still be discernible up to 10 years after[143]

See also

References

  1. ↑ Buller, Erin (2008-07-11). "Capturing the wind". Uinta County Herald. Retrieved 2008-12-04. The animals don't care at all. We find cows and antelope napping in the shade of the turbines. – Mike Cadieux, site manager, Wyoming Wind Farm
  2. 1 2 3 "IPCC Working Group III – Mitigation of Climate Change, Annex II I: Technology - specific cost and performance parameters" (PDF). IPCC. 2014. p. 10. Retrieved 1 August 2014.
  3. ↑ "IPCC Working Group III – Mitigation of Climate Change, Annex II Metrics and Methodology. pg 37 to 40,41" (PDF).
  4. ↑ Begoña Guezuraga, Rudolf Zauner, Werner Pölz, Life cycle assessment of two different 2 MW class wind turbines, Renewable Energy 37 (2012) 37-44, p 37. doi:10.1016/j.renene.2011.05.008
  5. ↑ Diesendorf, Mark. Why Australia Needs Wind Power, Dissent, Vol. No. 13, Summer 2003–04, pp. 43–48.
  6. 1 2 "Wind energy Frequently Asked Questions". British Wind Energy Association. Retrieved 2006-04-21.
  7. ↑ Eilperin, Juliet; Steven Mufson (16 April 2009). "Renewable Energy's Environmental Paradox". The Washington Post. Retrieved 2009-04-17.
  8. 1 2 "Wind farms". Royal Society for the Protection of Birds. 14 September 2005. Retrieved 6 December 2012.
  9. ↑ http://www.uel.ac.uk/erg/documents/Derrybrien.pdf Wind farms and blanket peat, Lindsay, Bragg. The rationale for wind farms is that they reduce CO2 emissions compared to fossil fuels. In most places, emissions from wind farms are associated only with the construction of the components and vehicular emissions linked to the site’s development and maintenance. However, on peatlands, construction results in significant ongoing CO2 release because they are substantial long-term carbon stores and this carbon is released when they are disturbed...It is difficult to understand the logic of damaging long-term carbon stores to install devices whose purpose is to reduce emissions
  10. ↑ http://www.theguardian.com/environment/2009/aug/13/wind-farm-peat-bog
  11. ↑ "Habitat Loss of Peatlands, Wind Farms on Peatlands".
  12. ↑ Gohlke JM Environmental Health Perspectives; et al. (2008). "Health, Economy, and Environment: Sustainable Energy Choices for a Nation". Environmental Health Perspectives 116 (6): A236–A237. doi:10.1289/ehp.11602. PMC: 2430245. PMID 18560493.
  13. ↑ Hamilton, Tyler (15 December 2009). "Wind Gets Clean Bill of Health". Toronto Star (Toronto). pp. B1–B2. Retrieved 16 December 2009.
  14. ↑ W. David Colby, Robert Dobie, Geoff Leventhall, David M. Lipscomb, Robert J. McCunney, Michael T. Seilo, Bo Søndergaard. "Wind Turbine Sound and Health Effects: An Expert Panel Review", Canadian Wind Energy Association (CanWEA), December 2009.
  15. ↑ Health Canada. "Wind Turbine Noise and Health Study". http://www.hc-sc.gc.ca/ewh-semt/noise-bruit/turbine-eoliennes/summary-resume-eng.php. Retrieved 7 November 2014. External link in |website= (help)
  16. 1 2 "Preliminary studies on the reaction of growing geese (Anser anser f. domestica) to the proximity of wind turbines".
  17. 1 2 Kubiszewski, Ida; C. J. Cleveland; P. K. Endres (1 January 2010). "Meta-Analysis of Net Energy Return for Wind Power Systems". Renewable Energy. 35 (1): 218–225. doi:10.1016/j.renene.2009.01.012.
  18. ↑ "Energy intensities, EROIs (energy returned on invested), and energy payback times of electricity generating power plants. Energy Volume 52, 1 April 2013, Pages 210–221".
  19. ↑ Dailykos - GETTING TO ZERO: Is renewable energy economically viable? by Keith Pickering MON JUL 08, 2013 AT 04:30 AM PDT.
  20. ↑ "Vestas: Comparing energy payback". Retrieved 2013-05-05.
  21. ↑ "Life cycle assessment of electricity produced from onshore sited wind power plants based on Vestas V82-1.65 MW turbines" page 4. Vestas, 29 December 2006. Accessed: 27 November 2014.
  22. ↑ Wittrup, Sanne. "6 MW vindmølle betaler sig energimæssigt tilbage 33 gange" English translation Ingeniøren, 26 November 2014. Accessed: 27 November 2014.
  23. ↑ Mielke, Erik. Water Consumption of Energy Resource Extraction, Processing, and Conversion Harvard Kennedy School, October 2010. Accessed: 1 February 2011.
  24. ↑ LCA in Wind Energy: Environmental Impacts through the Whole Chain
  25. ↑ Wind Energy Environmental issues. table V.1.2 & V.1.15
  26. ↑ ExternE. The EU's Externality study.Page 35 figure 9
  27. ↑ Hydropower-Internalised Costs and Externalised Benefits"; Frans H. Koch; International Energy Agency (IEA)-Implementing Agreement for Hydropower Technologies and Programmes; Ottawa, Canada.pg 131-134 Figure 1.
  28. ↑ ExternE. The EU's Externality study.Page 37
  29. ↑ White, S. W. (2007). "Net Energy Payback and CO2 Emissions from Three Midwestern Wind Farms: An Update". Natural Resources Research 15 (4): 271–281. doi:10.1007/s11053-007-9024-y.
  30. 1 2 "Life Cycle Greenhouse Gas Emissions of Utility-Scale Wind Power Systematic Review and Harmonization Stacey L. Dolan and Garvin A. Heath Article first published online: 30 MAR 2012 DOI: 10.1111/j.1530-9290.2012.00464.x".
  31. ↑ "IPCC Working Group III – Mitigation of Climate Change, Annex II Metrics and Methodology. pg 37 to 40,41" (PDF).
  32. ↑ "Claverton-Energy.com". Claverton-Energy.com. Retrieved 29 August 2010.
  33. ↑ "Is wind power reliable?". Archived from the original on 5 June 2010. Retrieved 29 August 2010.
  34. ↑ Milligan, Michael (October 2010) Operating Reserves and Wind Power Integration: An International Comparison. National Renewable Energy Laboratory, p. 11.
  35. ↑ "IPCC Working Group III – Mitigation of Climate Change, Annex II Metrics and Methodology. pg 37 to 40,41" (PDF).
  36. ↑ Martin Pehnt, Michael Oeser, Derk J. Swider: Consequential environmental system analysis of expected offshore wind electricity production in Germany. Energy 33, (2008), 747–759, doi:10.1016/j.energy.2008.01.007.
  37. ↑ Christian Breyer, Otto Koskinen, Philipp Blechinger: Profitable climate change mitigation: The case of greenhouse gas emission reduction benefits enabled by solar photovoltaic systems. Renewable and Sustainable Energy Reviews 49, (2015), 610–628, doi:10.1016/j.rser.2015.04.061.
  38. ↑ Perry, Simon; Ed Douglas (29 January 2011). "In China, the true cost of Britain's clean, green wind power experiment: Pollution on a disastrous scale". London: Daily Mail. Retrieved 2011-03-02.
  39. ↑ Hilsum, Lindsey (6 December 2009). "Chinese pay toxic price for a green world". London: The Sunday Times. Retrieved 2011-03-02.
  40. ↑ Bradsher, Keith (26 December 2009). "Earth-Friendly Elements Are Mined Destructively". The New York Times. Retrieved 2011-03-02.
  41. ↑ Biggs, Stuart (6 January 2011). "Rare Earths Leave Toxic Trail to Toyota Prius, Vestas Turbines". Bloomberg L.P. Retrieved 2011-03-02.
  42. ↑ Ingebretsen, Mark. Developing greener, cheaper magnets Ames Laboratory. Accessed: 10 March 2011.
  43. ↑ Biello, David (13 October 2010). "Rare Earths: Elemental Needs of the Clean-Energy Economy". Scientific American. Retrieved 2011-03-02.
  44. ↑ Enercon explanation on p.4 on avoidance of Neodymium use
  45. 1 2 3 4 New South Wales Government (1 November 2010). The wind energy fact sheet Department of Environment, Climate Change and Water, p. 13
  46. ↑ Paul Denholm, Maureen Hand, Maddalena Jackson, and Sean Ong, Land-Use Requirements of Modern Wind Power Plants in the United States, National Renewable Energy Laboratory, NREL/TP-6A2-45834, Aug. 2009.
  47. ↑ Prentice, Colin (19 December 2013). "Climate change poses serious threat to Britain's peat bogs". London: Imperial College Londonl. Retrieved 2013-12-19.
  48. ↑ Smith, Jo; et al. (5 September 2012). "Renewable energy: Avoid constructing wind farms on peat". Nature. Retrieved 5 September 2012.
  49. ↑ Stevenson, Tony Struan (20 May 2009). "Bid to ban peatland wind farms comes under attack". Sunday Herald (newsquest (sunday herald) limited). Retrieved 20 May 2009.
  50. ↑ David Tosh, W. Ian Montgomery & Neil Reid A review of the impacts of onshore wind energy development on biodiversity, Northern Ireland Environment Agency, Research and Development Series 14/02, 2014, p.54
  51. ↑ "RENEWABLE ENERGY — Wind Power's Contribution to Electric Power Generation and Impact on Farms and Rural Communities (GAO-04-756)" (PDF). United States Government Accountability Office. September 2004. Retrieved 2006-04-21.
  52. ↑ Van der Voo, Lee. Money Blows in to a Patch of Oregon Known for Its Unrelenting Winds, New York Times, 31 May 2011, pg A16
  53. ↑ Erich Hau. Windkraftanlagen: Grundlagen, Technik, Einsatz, Wirtschaftlichkeit, Berlin: Heidelberg 2008, pp. 621–623. (German). (For the english Edition see Erich Hau, Wind Turbines: Fundamentals, Technologies, Application, Economics, Springer 2005)
  54. ↑ Forest clearance for Meyersdale, Pa., wind power facility
  55. ↑ Statement of the Government of Brandenburg, Germany.
  56. ↑ "Canada's First Urban Wind Turbine - Not Your Average Windmill". Toronto Hydro. 2006-02-06. Archived from the original on 2008-03-30. Retrieved 2008-04-11.
  57. ↑ Wind farm construction impacts reindeer migration and movement corridors DOI: 10.1007/s10980-015-0210-8
  58. ↑ Effects of wind turbines on area use and behaviour of semi-domestic reindeer in enclosures http://dx.doi.org/10.7557/2.24.2.301 mirror
  59. ↑ Article list
  60. ↑ Zehnder and Warhaft, Alan and Zellman. "University Collaboration on Wind Energy" (PDF). Cornell University. Retrieved 17 August 2011.
  61. 1 2 3 4 "… the study already tells you the numbers are very rough estimates that need to be improved. I even explicitly state this, as well, in the conclusion: ‘the rudimentary numbers presented here are intended to provoke further research and discussion,’ in the abstract ‘this paper should be respected as a preliminary assessment,’ and in the title of the study, which has the word ‘preliminary’ in it...you are correct that errors 1 and 2 are true..." Benjamin Sovacool, Benjamin Sovacool takes issue with Lorenzini’s criticism of his work, Atomic Insights website, 11 July 2013.
  62. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Sovacool, Benjamin K. (2013). "The avian benefits of wind energy: A 2009 update". Renewable Energy 49: 19–24. doi:10.1016/j.renene.2012.01.074.
  63. ↑ "U.S. Fish & Wildlife Estimate of Bird Mortality Due to Wind Turbines" (PDF). Letter to the Department of the Interior. American Bird Conservancy. 22 March 2012. Retrieved 6 December 2012.
  64. ↑ Smallwood, K. S. (2013). "Comparing bird and bat fatality-rate estimates among North American wind-energy projects". Wildlife Society Bulletin 37: 19–33. doi:10.1002/wsb.260.
  65. ↑ Ruane, Laura (6 November 2008). "Newest Air Defense: Bird Dogs". USA Today. Retrieved 6 December 2012.
  66. ↑ Contaminant Issues - Oil Field Waste Pits, U.S. Fish & Wildlife Service, U.S. Department of the Interior. Retrieved July 30, 2013.
  67. ↑ Johns, Robert. Actions by Feds Cut Annual Bird Deaths in Oil and Gas Fields by Half, Saving Over One Million Birds From Grisly Death, Washington, D.C.: American Bird Conservancy, January 3, 2013. Retrieved July 30, 2013.
  68. 1 2 3 4 Bird, David Michael. The Bird Almanac: The Ultimate Guide to Essential Facts and Figures of the World's Birds, Key Porter Books, 1999, ISBN 155263003X, ISBN 978-1552630037.
  69. ↑ North-Hager, Eddie. "Millions of Birds Perish at Communication Towers, USC Study Finds". University of Southern California. Retrieved 6 December 2012.
  70. 1 2 Foderaro, Lisa W. Researching Stop Signs in the Skies for Birds, May 14, 2014, p. A21 (New York edition), and May 13, 2014 online. Retrieved from nytimes.com on May 14, 2014. Quote: "In January, scientists concluded that, nationwide, 365 million to 988 million birds die annually after crashing into buildings and houses."
  71. ↑ "Cats Indoors! The American Bird Conservancy's Campaign for Safer Birds and Cats". National Audubon Society. Retrieved 6 December 2012.
  72. ↑ Angier, Natalie. , The New York Times, January 29, 2013, Retrieved January 30, 2013.
  73. ↑ U.S. Cats Kill Up To 3.7 Billion Birds, 20.7 Billion Small Mammals Annually, Paris: Agence France-Presse, January 29, 2013. Retrieved from The Globe & Mail website, January 30, 2013.
  74. ↑ UK's most powerful wind farm could power Paisley, British Wind Energy Association, January 2006.
  75. 1 2 Baerwald, Erin F; D'Amours, Genevieve H; Klug, Brandon J; Barclay, Robert MR (2008-08-26). "Barotrauma is a significant cause of bat fatalities at wind turbines". Current Biology 18 (16): R695–R696. doi:10.1016/j.cub.2008.06.029. OCLC 252616082. PMID 18727900. Lay summary – CBC Radio - Quirks & Quarks (2008-09-20). Laysource includes audio podcast of interview with author.
  76. ↑ Craig K.R. Willis, Robert M.R. Barclay, Justin G. Boyles, R. Mark Brigham, Virgil Brack Jr., David L. Waldien, Jonathan Reichard (2010). "Bats are not birds and other problems with Sovacool's (2009) analysis of animal fatalities due to electricity generation". Energy Policy 38 (4): 2067–2069. doi:10.1016/j.enpol.2009.08.034.
  77. ↑ Lorenzini, Paul (April 30, 2013). "Nukes kill more birds than wind?". Atomic Insights. Retrieved 26 August 2013.
  78. ↑ K. Shawn Smallwood, "Comparing bird and bat fatality-rate estimates among North American wind-energy projects", Wildlife Society Bulletin, 26 Mar. 2013.
  79. ↑ "Estimates of bird collision mortality at wind facilities in the contiguous United States Scott R. Lossa et. al.".
  80. ↑ "Study: California Wind Power is the Worst For Wildlife, Chris Clarke, November 2013.".
  81. ↑ Barclay, Robert; E. F. Baerwald; J.C. Gruver (2007). "Variation in bat and bird fatalities at wind energy facilities" (PDF). Canadian Journal of Zoology 85: 381–387. doi:10.1139/Z07-011. Retrieved 6 December 2012.
  82. ↑ Marris, Emma; Daemon Fairless (10 May 2007). "Wind farms' deadly reputation hard to shift". Nature 447 (7141): 126. Bibcode:2007Natur.447..126M. doi:10.1038/447126a. Retrieved 28 June 2013.
  83. 1 2 Emma Marris; Daemon Fairless (10 May 2007). "Wind farms' deadly reputation hard to shift". Nature 447 (7141): 126. Bibcode:2007Natur.447..126M. doi:10.1038/447126a. (subscription required)
  84. ↑ J. Ryan Zimmerling, Andrea C. Pomeroy, Marc V. d'Entremont and Charles M. Francis, “Canadian estimate of bird mortality due to collisions and direct habitat loss associated with wind turbine developments”, Avian Conservation & Ecology, 2013, v.8 n.2.
  85. ↑ Sahagun, Louis (16 February 2012). "U.S. probes golden eagles' deaths at DWP wind farm". Los Angeles Times. Retrieved 6 December 2012.
  86. ↑ Balogh, Anne L. & Ryder, Thomas B. & Marra, Peter P. "Population demography of Gray Catbirds in the Suburban Matrix: Sources, Sinks and Domestic Cats", Journal of Ornithology, 2011, doi:10.1007/s10336-011-0648-7
  87. ↑ Austen, Ian. Casualties of Toronto’s Urban Skies, The New York Times, October 28, 2012, p. A6. Retrieved online November 2, 2012.
  88. ↑ Kennedy, Joe. Country Matters: City Birds Battered To Oblivion, Dublin, Ireland: Sunday Independent, November 4, 2012. Retrieved online, November 4, 2012.
  89. ↑ Lomborg, Bjørn (2001). The Skeptical Environmentalist. New York City: Cambridge University Press.
  90. ↑ 10,000 Birds Trapped In The World Trade Center Light Beams, StapleNews, September 16, 2010.
  91. ↑ Johnston, D; Haines (1957). "Analysis of Mass Bird Mortality in October, 1954". The Auk 74 (4): 447–458. doi:10.2307/4081744.
  92. ↑ Fitch, Davey. Upland birds face displacement threat from poorly sited wind turbines (press release), Royal Society for the Protection of Birds website, September 26, 2009. Retrieved August 2, 2013. This press release in turn cites:
    • Pearce-Higgins, J. W.; Stephen, L.; Langston, R. H. W.; Bainbridge, I. P.; Bullman, R. (2009). "The distribution of breeding birds around upland wind farms". Journal of Applied Ecology. doi:10.1111/j.1365-2664.2009.01715.x.
  93. ↑ Elliott, Valerie (28 January 2006). "Wind Farms Condemned As Eagles Fall Prey To Turbines". The Times. Retrieved Accession No.: 7EH1804703031. Check date values in: |access-date= (help)
  94. ↑ McDermott, Matthew (2 May 2009). "Texas Wind Farm Uses NASA Radar to Prevent Bird Deaths". Treehugger. Retrieved 6 December 2012.
  95. ↑ "Wind Turbines A Breeze For Migrating Birds". New Scientist (2504): 21. 18 June 2005. Retrieved 6 December 2012.
  96. ↑ Desholm, Mark; Johnny Kahlert (9 June 2005). "Avian Collision Risk At An Offshore Wind Farm". Biology Letters 1 (3): 296–298. doi:10.1098/rsbl.2005.0336. Retrieved 6 December 2012.
  97. ↑ Bob Yirka (15 August 2012). "British researchers find geese alter course to avoid wind farm". Phys.org. Retrieved 6 December 2012.
  98. ↑ Dalton, Andrew (7 December 2010). "Altamont Pass to Get Less-Deadly Wind Turbines". SFist. Retrieved 6 December 2012.
  99. ↑ "Federal Environmental Impact Statement for Chokecherry and Sierra Madre Wind Energy project". Bureau of Land Management. 3 July 2012. Retrieved 6 December 2012.
  100. ↑ "Caution Regarding Placement of Wind Turbines on Wooded Ridge Tops" (PDF). Bat Conservation International. 4 January 2005. Retrieved 2006-04-21.
  101. ↑ "Effectiveness of Changing Wind Turbine Cut-in Speed to Reduce Bat Fatalities at Wind Facilities" (PDF). American Wind Energy Association. 2009-04-28. Retrieved 2009-04-28.
  102. ↑ Aron, Jacob (2009-07-17). "Radar beams could protect bats from wind turbines". London: The Guardian. Retrieved 2009-07-17.
  103. ↑ Nicholls, Barry; Racey, Paul A. (2007). Cresswell, Will, ed. "Bats Avoid Radar Installations: Could Electromagnetic Fields Deter Bats from Colliding with Wind Turbines?". PLoS ONE 2 (3): e297. Bibcode:2007PLoSO...2..297N. doi:10.1371/journal.pone.0000297. PMC: 1808427. PMID 17372629. Lay summary – The Guardian (2009-07-17).
  104. ↑ Morin, Monte. 600,000 bats killed at wind energy facilities in 2012, study says, LA Times, November 8, 2013.
  105. ↑ Turbines and turbulence, Nature (journal), 468, 1001, 23 December 2010, DOI:10.1038/4681001a, published online 22 December 2010.
  106. ↑ Somnath Baidya Roy and Justin J. Traiteur. Impacts of wind farms on surface air temperatures, Proceedings of the National Academy of Sciences, Vol. 107, No. 42, October 19, 2010, p. 17,899.
  107. ↑ Wind farms impacting weather, Science Daily.
  108. ↑ The influence of large-scale wind power on global climate — PNAS
  109. ↑ MIT analysis suggests generating electricity from large-scale wind farms could influence climate — and not necessarily in the desired way MIT, 2010.
  110. ↑ Thomas Kirchhoff (2014): Energiewende und Landschaftsästhetik. Versachlichung ästhetischer Bewertungen von Energieanlagen durch Bezugnahme auf drei intersubjektive Landschaftsideale, in: Naturschutz und Landschaftsplanung 46 (1), 10-16.
  111. ↑ Tourismus und Regionalentwicklung in Bayern, Diana Schödl, Windkraft und Tourismus – planerische Erfassung der Konfliktbereiche, in Marius Mayer, Hubert Job, 05.12.2013, Arbeitsgruppe „Tourismus und Regionalentwicklung" der Landesarbeitsgemeinschaft Bayern der ARL, p 125. ff
  112. ↑ Günter Ratzbor (2011): Windenergieanlagen und Landschaftsbild. Zur Auswirkung von Windrädern auf das Landschaftsbild. Thesenpapier des Deutschen Naturschutzrings DNR, p. 17-19
  113. ↑ Gourlay, Simon. Wind farms are not only beautiful, they're absolutely necessary, The Guardian, 12 August 2008.
  114. ↑ "Tourism blown off course by turbines". Berwickshire: The Berwickshire News. 2013-03-28. Retrieved 2013-10-08.
  115. ↑ Young, Kathryn (2007-08-03). "Canada wind farms blow away turbine tourists". Edmonton Journal. Retrieved 2008-09-06.
  116. ↑ Zhou, Renjie; Yadan Wang (2007-08-14). "Residents of Inner Mongolia Find New Hope in the Desert". Worldwatch Institute. Retrieved 2008-11-04.
  117. ↑ "Centre d'interprétation du cuivre de Murdochville". Retrieved 2008-11-19. - The Copper Interpretation Centre of Murdochville, Canada features tours of a wind turbine on Miller Mountain.
  118. ↑ Windenergie in Deutschland: Konstellationen, Dynamiken und Regulierungspotenziale Im Innovationsprozess, Bö Ohlhorst, Springer-Verlag, 2009, p.90 ff
  119. ↑ Windenergie in Deutschland: Konstellationen, Dynamiken und Regulierungspotenziale Im Innovationsprozess, Bö Ohlhorst, Springer-Verlag, 2009, p.163, "Kritik an zunehmend industrieller Charakter der Windenergienutzung"
  120. ↑ Dipert, Brian. Cutting the carbon-energy cord: Is the answer blowin' in the wind?, EDN Network website, December 15, 2006.
  121. 1 2 Sören Schöbel (2012): Windenergie und Landschaftsästhetik: Zur landschaftsgerechten Anordnung von Windfarmen, Jovis-Verlag, Berlin
  122. ↑ UNESCO's Wind Turbine Problem: Mont-Saint-Michel's World Heritage Status Under Threat, Stefan Simons, Der Spiegel
  123. ↑ Nohl, Werner (2009): Landschaftsästhetische Auswirkungen von Windkraftanlagen, p.2, 8
  124. ↑ Fittkau, Ludger: Ästhetik und Windräder, Neues Gutachten zu "Windenergienutzung und bedeutenden Kulturlandschaften" in Rheinland-Pfalz, Kultur heute, 30 July 2013
  125. ↑ Rod Thompson (20 May 2006). "Wind turbine lights have opponents seeing sparks". Honolulu Star-Bulletin. Retrieved 2008-01-15.
  126. ↑ New South Wales Government (1 November 2010). The wind energy fact sheet, Department of Environment, Climate Change and Water of New South Wales, p. 12.
  127. ↑ Committee on Environmental Impacts of Wind Energy Projects, National Research Council (2007). Environmental Impacts of Wind-Energy Projects, p. 158-9.
  128. ↑ Turbine goes up in flames Retrieved August 26, 2013.
  129. ↑ Brown, Curt. Dartmouth Select Board OKs Permit For Two Wind Turbines, SouthCoastToday.com January 05, 2010. Retrieved February 8, 2012.
  130. ↑ Major Offshore Wind Farm Fitted With Fire Extinguishers, Infor4Fire.com website, August 19, 2011. Retrieved February 8, 2012.
  131. ↑ Fire Protection For Wind Turbines: Safe For Certain – MiniMax, Minimax.de website. Retrieved February 8, 2012.
  132. ↑ Aspirating Smoke Detector AMX4004 WEA For Wind Energy Plants: Cool Down Fire Protection By Minimax, Minimax.de website. Retrieved February 8, 2012.
  133. ↑ Built-in fire brigade: water vs nitrogen; Dealing with fire is likely to become an increasingly hot topic for the wind turbine business, Modern Power Systems, May 1, 2007.
  134. ↑ Wardrop, Murray (2008-12-04). "Wind turbine closed after showering homes with blocks of ice". The Daily Telegraph (London).
  135. ↑ Michael Klepinger, Michigan Land Use Guidelines for Siting Wind Energy Systems, Michigan State University, October 2007
  136. ↑ Rodmell, D. & Johnson, M., 2002. The development of marine based wind energy generation and inshore fisheries in UK waters: Are they compatible? In M. Johnson & P. Hart, eds. Who owns the sea? University of Hull, pp. 76–103.
  137. ↑ "Tethys".
  138. ↑ Internationales Wirtschaftsforum Regenerative Energien (IWR), German wind power industry Offshore windpark website
  139. ↑ Study finds offshore wind farms can co-exist with marine environment, BusinessGreen.com website.
  140. ↑ UK Offshore Energy: Strategic Environmental Assessment, UK Department of Energy and Climate Change, January 2009.
  141. ↑ Johnson, M.L. & Rodmell, D.P., 2009. Fisheries, the environment and offshore wind farms: Location, location, location. Food Ethics, 4(1), pp.23–24.
  142. ↑ Warwicker, Michelle. "Seals 'feed' at offshore wind farms, study shows" BBC, 21 July 2014. Accessed: 22 July 2014. Video of seal path
  143. ↑ Newell, R.C., Seiderer, L.J. & Hitchcock, D.R., 1998. The impact of dredging works in coastal waters: A review of the sensitivity to disturbance and subsequent recovery of biological resources on the sea bed. Oceanography and Marine Biology Annual Review, 36, pp.127–178.

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