Superfact 87: Wind energy is a clean, renewable, and sustainable power source that produces no atmospheric emissions or water pollution during operation. Manufacturing and installation have a small carbon footprint that is much smaller than the carbon footprint of the fossil fuels they potentially replace.
There is a lot of disinformation being spread about wind power. One recent example is the TV series Landman which presents demonstrably false claims as facts. In Texas where I live the problem with deceitful anti-renewable propaganda is especially severe. It is important to check with reputable sources before you believe what you come across. Wind energy is not 100% clean and not without issues but it is much safer and cleaner than the fossil fuels they potentially replace. Below is a two minute video that explains this.
The graph below from Our World in Data depicting lifetime greenhouse gas emissions (construction, operation, disposal) show that the lifetime greenhouse gas emissions of coal power are 88 times higher than those of wind power and kill 615 times as many people as wind power. The lifetime greenhouse gas emissions of natural gas are 40 times higher than those of wind power and kill 460 times as many people as wind power. The difference is staggering. When someone tells you that there’s nothing clean about wind power, they are not just lying to you, they are lying very big.
In the graph below, greenhouse gas emissions is measured of CO2 equivalents per Gigawatt-hour of electricity over the lifecycle of the power plant. 1 Gigawatt-hour is the annual electricity consumption of 150 people in the EU. Death rate from accidents and air pollution is measured as deaths per Terawatt hour of electricity production. 1 terawatt hour is the annual electricity consumption of 150,000 people in the EU.
As you can see wind power is safe and emits very little greenhouse gases over its lifetime. In addition, there is no water impact associated with the operation of wind turbines, but a relatively small amount is used in manufacturing. There are other issues with land use, sounds, rare earth mining, waste, and effects on wildlife particularly birds.
However, these issues are in general smaller than depicted must be compared to issues with the fossil fuels they replace. For example, 15 billion tons of fossil fuels (including 9 billion tons of coal) are mined every year and burned whilst the annual mining for all clean energy technologies is around 7 million tons (2,000 times less). More about birds in the next section. Overall wind energy is a clean, renewable, and a sustainable power source. You can read more about this here, here, here, or here.
I am referring to this fact as a super fact because, it is true, an important topic, and yet it’s a fact that is difficult for many people to believe. Too much misinformation has been spread about wind power. I expect some people to dismiss this fact out of hand. But that is the point of super facts, they are true but hard to believe for many, or surprising, and perhaps even shocking.
Wind power saves a lot more birds than it kills
It may come as a surprise to some, but wind power is not a major cause of bird death. Wind farms are estimated to be responsible for losing less than 0.4 birds per gigawatt-hour (GWh) of electricity generated, compared to over 5 birds per GWh for fossil fueled power stations. This means that replacing fossil fuels with wind power saves a lot more birds than wind power turbines take. In addition, cats, windows, cars, poison and powerlines are examples of things that kill a lot more birds than wind power does. Cats kill thousands of times more birds than wind power does, and this usually does not bother us. Note I love both dogs and cats.
It is difficult to make exact estimates of bird deaths but below are some interesting graphs from reputable sources, confirmed by many other studies and analysis, such as this overview from MIT and this analysis by Hannah Richie. The numbers aren’t the same, but they make the same point. You can read more about this here.
That does not mean we shouldn’t do our best to reduce bird deaths from wind power stations. However, don’t fall for the misinformation that is trying to paint it is a big problem specifically for wind power.
Wind Power is Inexpensive
Finally, a bit of a deviation from the main topic. In addition to being a relatively clean, renewable, and sustainable power source, wind power is now relatively cheap, which explains its recent success around the world. I am bringing this up because another widespread myth about wind power is that it is expensive and wouldn’t survive without subsidies.
Practically all energy sources are subsidized, and fossil fuels have a long history of government subsidies. Below is the average unsubsidized levelized cost of energy according to Lazard. Levelized means that construction costs, land rent, and other costs not directly caused by electricity generation are taken into consideration. Notice how cheap wind is (blue line). This graph is for the United States.
Windpower is not only relatively cheap. Wind power is one of the most efficient and sustainable energy sources available. The energy required to manufacture, install, and maintain wind turbines is small compared to the energy they produce over their lifespan. This is known as their energy return on investment (EROI), which is quite favorable for wind energy. The Institute of Environmental Management and Assessment (IEMA) states that the average wind farm will pay back the energy that was used in its manufacture within 3-5 months of operation. This article in the journal Renewable Energy found that the average windfarm produces 20-25 times more energy during its operational life than was used to construct and install its turbines. It included data from 119 turbines across 50 sites going back 30 years.
It is important to be aware that there are many false claims floating around about wind power. The sound from wind power stations does not cause cancer, it does not use any other energy sources while operating; it solely harnesses the kinetic energy from the wind to generate electricity, meaning it only relies on wind to function as its primary energy source. Windpower is not a major cause if bird deaths. To read more about false claims about wind power click here.
Conclusion
There are positive and negative aspects of wind power, like any other source of energy. One issue with wind power (and solar) is that it is an intermittent source of energy. When the wind is not blowing you need other sources of energy (until there is sufficient energy storage). This is less of a problem when you have a mix of energy sources and in practice it has not been a big problem so far. However, what we know is that Wind Energy is indeed clean energy, much cleaner than the fossil fuels they potentially replace, and also relatively cheap, even without subsidies.
Other Posts by Me Related to Wind Power
- Nonsense and Rumors About Wind Power
- Wind power is providing more than a quarter of Texas Power
- Wind power is not a major cause of bird death
- 10 Wind Blowing Facts About Birds
