- Though all forms of energy can affect wildlife, wind farms have generally not been linked to population-level effects on most bird and bat species. In addition, the wind industry has collaborated with wildlife stakeholders for nearly three decades, leading to a deeper understanding of wind-wildlife interactions and improving operational guidelines to avoid, minimize, and compensate for any impact on wildlife.
- Wind energy projects are bound by strict federal laws that protect sensitive, endangered, and migratory species. It is widely recognized among wildlife scientists and conservationists that climate change poses a far greater threat to wildlife and habitats than wind energy. Renewable energy sources, such as wind power, are crucial in addressing the climate crisis.
- The wind industry's efforts to comply with regulatory standards for wildlife protection are complemented by support from organizations like the Audubon Society. This renowned conservation group advocates for responsibly sited and operated wind energy, highlighting its critical role in combating climate change. The Audubon Society's endorsement is based on the necessity of expanding renewable energy, including wind power, to limit global warming – a crucial step in safeguarding birds, wildlife, and their habitats.
Renewable Energy Wildlife Institute – Guide to Wind Energy and Wildlife
Alliance for Energy Independence – Is Wind Energy Safe for Wildlife?
Audubon Society – Wind Power and Birds. Properly sited wind power can help protect birds from climate change.
Wind energy is one of the most cost-effective forms of energy generation. Integrating more affordable renewable energy like wind into the regional grid reduces the necessity for costlier and imported fossil fuel-generated power, which can lead to lower energy bills.
While the degree of savings depends on factors like the energy mix in your area, local market conditions, and energy policies, the overall impact of increased grid diversification through energy sources like wind on energy bills is positive.
The number of jobs a wind farm creates varies depending on the project's scale, location, specific requirements and the developmental phase.
Jobs created include roles in environmental impact assessment, civil, electrical and mechanical design, and commercial engineering during the design stages. During construction, there's a demand for civil, mechanical, and electrical professionals, construction managers, and support staff. Once the wind farm is operational, several long-term employees are required to perform vital ongoing maintenance and ensure the efficient operation of the wind farm.
Not all wind farms have blinking lights, but the Federal Aviation Administration (FAA) mandates that wind turbines taller than 500 feet must be equipped with lights to warn aircraft. However, modern technology, such as the Aircraft Detection Lighting System (ADLS), allows these lights to be activated only when an aircraft is approaching the wind farm at a low altitude. This system is applied on a turbine-by-turbine basis and needs FAA approval. Thus, while wind farms are equipped with lights for safety, advancements like ADLS significantly limit their impact on the surrounding area​.
Federal Aviation Agency – Advisory Circular
Despite widespread misconceptions, several peer-reviewed studies have found that wind farms have no lasting negative effects on surrounding property values and can result in the opposite, up to a 7% increase in home value.
While a comprehensive study in 2023 found minor short-term decreases in home sale prices, within a mile of wind turbines during construction, this effect is short-lived with homes returning to their previous levels within three to five years after the wind farm operations begin. The effect was only present in more densely populated counties, in areas with lower population density, the study found no significant impact on property values at all​.
Brunner, E., Schwegman, D. (2022). Commercial Wind Energy Installations and Local Economic Development: Evidence from U.S. Counties Energy Policy, Volume 165.
Hoen, B., Brown, J., Jackson, et al. (2014). Spatial Hedonic Analysis of the Effects of US Wind Energy Facilities on Surrounding Property Values. The Journal of Real Estate Finance and Economics.
Hoen, B., BrownJ., Jackson,T., et al.(2013). A Spatial Hedonic Analysis of the Effects of Wind Energy Facilities on Surrounding Property Values in the United States. Lawrence Berkeley National Laboratory
Hoen,B., Rand, J.,Schwegman,D., et al. (2023). Commercial Wind Turbines and Residential Home Values:New Evidence from the Universe of Land-Based Wind Projects in the United States. Energy Markets & Policy Berkeley Lab
While ice can form on turbine blades and may be dislodged, modern turbines are equipped with cold-weather features that include de-icing elements like ice-resistant coatings and built-in heating systems. Additionally, wind farms are designed with setbacks, maintaining a safe distance between turbines and nearby structures to minimize the risk of ice throw. These measures significantly reduce the likelihood and impact of ice shedding from turbines.
Yes, about 85%–90% of turbine components are made of fully recyclable materials. The primary challenge lies in recycling the turbine blades, which are made of fiber-reinforced composites like carbon fiber and fiberglass. However, industry researchers and experts are actively working on new recycling methods, materials, and innovative manufacturing processes to improve the recyclability of the final 10% to 15%.
Wind Energy Technologies Office.) – Wind Turbine Sustainability
Pehlken, A., Garcia Sanchez, R. (2013). “How Critical Is Wind Energy?” In Sustainable Material Life Cycles - Is Wind Energy really Sustainable? Hanse Studies Volume 9. Edited by Alexandra Pehlken, Andreas Solsbach, Wolfgang Stenzel, 85–102. Oldenburg, Germany: BIS-Verlag der Carl von Ossietzky Universtät Oldenburg.
The current lifespan of a typical wind turbine is between 30 to 40 years, with routine maintenance required every six months.
Wiser, R., Bolinger M. (2019). Benchmarking Anticipated Wind Project Lifetimes: Results from a Survey of U.S. Wind Industry Professionals. Energy Markets & Policy Berkeley Lab
Wind turbines are designed to operate in extreme cold weather conditions. According to international standards, they are expected to function normally in temperatures as low as -4 degrees Fahrenheit. Most modern wind turbines come equipped with cold temperature features, which include specific elements such as de-icing systems. These features enable the turbines to operate in even colder conditions, down to around -22 degrees Fahrenheit, making them a very stable source of energy.
International Electrotechnical Commission – Wind energy generation systems - Part 1: Design requirements
Decommissioning a wind farm is a carefully regulated process that involves several key steps to ensure the safe and environmentally responsible removal of turbines and associated infrastructure. This process is generally initiated 18-24 months before the projected end of operations. The overall process typically involves dismantling the turbines, recycling or disposing of materials responsibly, and restoring the land to its pre-project condition. Decommissioning typically begins within 18-24 months prior to the end of operations and is completed within 12-24 months.
The regulations and procedures for decommissioning ensure that wind farms are removed in a way that minimizes environmental impact and safely manages the end-of-life of these large structures, safeguarding the interests of the local community, landowners, and the environment.
Office of Energy Efficiency & Renewable Energy – Wind Energy End-of-Service Guide
Yes, a wind project can be repowered. Repowering involves either fully replacing all turbines or partially upgrading certain components of older turbines with newer, more efficient models. Full repowering is less common compared to partial repowering, which happens more frequently.
Repowering is a strategic decision for wind farm operators. It involves considering the initial investment versus the long-term benefits, which include increased energy production and potential cost savings. By repowering, operators can ensure their wind farms continue to operate efficiently and effectively, taking advantage of the latest advancements in wind energy technology​.
Office of Energy Efficiency & Renewable Energy – Wind Energy End-of-Service Guide
If a company operating a wind project goes bankrupt, the assets of the project would typically be liquidated. The wind project itself, being a valuable asset due to its potential for generating income, would likely attract interest from other parties who might purchase and continue operating it. This ensures that the project isn't just abandoned.
If the wind farm is decommissioned, many state regulations mandate that the facility owner is responsible for removing the wind farm and restoring the land. Taxpayers and landowners will be protected from bearing any financial burden. Such decommissioning requirements provide a safety net, ensuring that there are reserved funds to remove the turbines and rehabilitate the site, even if the company operating the project goes bankrupt.
Wind power is considered to be a highly reliable source of energy. On an annual basis, the amount of energy generated by a wind turbine is predictable with a high degree of confidence, allowing it to be reliably integrated into the electric grid. This reliability is further enhanced when wind turbines are spread across large geographical areas.
In comparison to large conventional power plants, which can shut down abruptly and require expensive, fast-acting reserves, the gradual and predictable nature of wind changes allows for more cost-effective management.
Furthermore, modern wind farms contribute to essential grid reliability, often matching or surpassing conventional power plants thanks to their sophisticated control systems and advanced technology.
FIFTEEN EIGHTY FOUR Academic perspectives from Cambridge University Press – How reliable is wind energy?
American Clean Power – Wind Power Facts
After decommissioning, a wind turbine site can be repurposed in various ways, depending on the specifics of the land lease agreements and local regulations. These agreements often require the restoration of the site to its original condition, which typically includes activities like reseeding vegetation and repairing any disrupted drainage systems. To minimize environmental impacts, communities may permit some below-ground infrastructure, such as foundations and wiring, to remain in place, provided it doesn't interfere with future land uses like agriculture.
The depth of the infrastructure left behind and the amount of topsoil needed for backfilling are determined based on the intended land use and the site's geographic location. This careful approach ensures that decommissioned wind turbine sites are responsibly managed and repurposed, balancing environmental considerations with potential new uses​.
Office of Energy Efficiency & Renewable Energy – Wind Energy End-of-Service Guide
Wind turbines are designed to endure high wind speeds and extreme weather, including conditions found in tornado-prone areas. In fact, modern turbines are engineered to pause operation when wind speeds exceed about 50 mph or when gusts reach around 100 mph. This automatic pausing helps reduce the load on the turbine and minimizes the likelihood of damage.
As an added precaution, wind projects are typically planned with setbacks from roads, homes, and other infrastructure. These setbacks ensure that neighboring communities are at an ample distance from the wind turbines, further enhancing safety during extreme weather events like tornadoes."
Wind turbines, due to their height, are susceptible to lightning strikes. However, they are equipped with lightning protection systems designed to safely direct the lightning down the blade, thereby reducing potential damage. Additionally, setbacks from roads, residences, and other structures are in place in wind projects. These ensure that communities and landowners are kept at an ample distance from the turbines, minimizing any risks associated with lightning strikes.
Shadow flicker, a rare occurrence estimated to happen just a few hours each year, is when rotating wind turbine blades intermittently cast shadows, creating a flickering light effect similar to driving under a canopy of trees with the sun peeking through.
Many wind energy ordinances have established minimum setback distances to minimize shadow flicker impact. These regulations ensure wind turbines are placed a certain distance from existing property boundaries, ensuring that any potential shadow flicker effects are significantly reduced or eliminated in new wind energy projects.
Office of Energy Efficiency & Renewable Energy – Wind Energy Projects and Shadow Flicker
Wind turbines are generally considered to be very safe. Thanks to their built-in safety systems and carefully monitored operation, turbines have an excellent safety record, with incidents being rare occurrences. These built-in systems and operation protocols include addressing potential issues like blade icing and the shedding of ice, as well as the unlikely event of a blade throw. With strategic placement ensuring an ample distance from residential structures and a commitment to regular maintenance, turbines that fail to meet safety standards are efficiently removed from operation.
Office of Energy Efficiency & Renewable Energy – Wind Energy Projects and Safety
No, wind turbines do not leak harmful chemicals into nearby groundwater. Unlike some other energy sources, they do not release emissions that can pollute air or water and do not require water for cooling processes. Additionally, the shift towards wind energy can lead to a decrease in electricity generation from fossil fuels, resulting in lower overall air pollution and reduced carbon dioxide emissions.
U.S. Energy Information Administration – Wind explained, Wind energy and the environment
The perception of noise from wind turbines is a common concern, but in reality, they generate relatively low levels of sound. Modern wind turbines are designed to be quiet, and their noise output is often only marginally higher than the surrounding ambient wind noise. To put it in perspective, at a typical setback distance of 1,000 feet from a home or building, the sound level produced by wind turbines is in the range of 35–45 decibels. This level of noise is comparable to the sound of a household refrigerator, which is about 40 decibels, or an air conditioner, which is around 50 decibels. Typically, two people can carry on a conversation at normal voice levels even while standing directly below a turbine.
Office of Energy Efficiency & Renewable Energy.) – Wind Turbine Sound
It is very normal for some turbines to operate while others remain idle. Differences of wind speed, directions, and intensity are common, leading to times where some turbines are active while others are not. Additionally, utility curtailment may lead to certain turbines being turned off to balance the overall energy supply with demand. This happens when electricity production from other sources, such as gas or solar, is sufficient to meet current energy needs.
Turbines are also equipped with a Supervisory Control and Data Acquisition (SCADA) system that collects data, records activity, and allows for remote supervision and control of a wind farm. With this, operators can easily manage power output in real-time and quickly respond to changes in demand. It keeps wind energy efficient and easily scalable.
Yes, in fact, all energy sources in the United States have benefited from subsidies for over a century. This approach by the federal government is aimed at promoting a diverse domestic energy portfolio and encouraging investment in our nation’s energy independence. While these subsidies help promote and support the wind energy sector, it's worth noting that wind energy is one of the most cost-effective and efficient forms of energy, even when considered without subsidies​.
Office of Energy Efficiency & Renewable Energy – Wind Energy Financial Incentives
Yes, ranching and farming can effectively coexist with wind turbines. The footprint of wind turbines and their access roads is relatively small, occupying only a minor portion of the land leased for wind energy projects. This minimal land use allows the vast majority of the area to remain available for agricultural activities. Farmers and ranchers can continue their usual operations of growing crops and raising livestock alongside these wind turbines, making the land productive for both agricultural and renewable energy purposes.
Additionally, the presence of wind turbines on agricultural land can provide a significant financial benefit to landowners. Wind farms offer an additional source of long-term income through land lease payments. These payments amount to $706 million annually, contributing to income diversification and increased financial security for landowners. Especially in years of lower agricultural production, these lease payments can be crucial in helping maintain family-owned lands across generations.
Office of Energy Efficiency & Renewable Energy – Wind Energy's Economic Impacts to Communities
Wind energy offers several benefits to communities, particularly in driving economic growth, especially in rural areas. Here's a summary of the key benefits:
Job Growth: The wind energy sector creates numerous jobs in manufacturing, construction, and service. By 2020, it supported over 120,000 jobs across all U.S. states​​. Wind turbine technician is notably the fastest-growing job in the country, with projections indicating a 45% increase in opportunities over the next decade​​. This promising increase will continue to foster career opportunities, provide substantial support for families, and promote economic growth in communities throughout the US.
Increase in Tax Revenue: Wind projects have contributed significantly to state and local economies. For instance, in 2022, they delivered $2 billion in tax and land-lease payments. This reliable tax revenue provides support to enhance community services, including education, emergency services, and infrastructure upgrades.
Local Spending: Wind energy projects often involve partnerships with local businesses and suppliers, thereby injecting capital into the community. Landowners receive steady lease payments from wind developers, which are reinvested locally. In addition, during the construction phase, wind projects create a wealth of opportunities to support local businesses, services, and hospitality industries, ensuring widespread economic benefits.
American Clean Power – Wind Power Facts
U.S. Bureau of Labour Statistics – Fastest Growing Occupations
The power produced by wind projects is sent to the regional grid where it is deployed to wherever demand dictates it is needed most. This is a similar process to the American tradition of exporting locally grown crops and livestock to states across the US.
That being said, almost all economic benefits are felt in project communities. These economic benefits include lease payments for farmers hosting turbines on their land, creating a new and stable source of income. These payments help to sustain the agricultural character of the community and preserve traditional ways of living. Thus, wind energy becomes a valuable and harmonious addition to agricultural exports, enhancing the local economy while supporting environmental sustainability.