The goal of this blog is to create a long list of facts that are important, not trivia, and that are known to be true yet are either disputed by large segments of the public or highly surprising or misunderstood by many.
Superfact 17: Fossil fuels kill a lot more birds per gigawatt hour than wind power does. Cats, windows, cars, poison and powerlines are examples of things that kill a lot more birds than wind power does. Wind power killing birds is not the huge environmental problem it is often made out to be.
Wind power killing birds is often mentioned as a slam dunk environmentally based argument against wind power and evidence for the hypocrisy of environmentalists. This is misguided. Wind power killing birds is a real problem and it should be addressed, and it is being addressed. No energy source comes without environmental problems. However, wind turbines account for only a small fraction of overall bird deaths compared to other human causes. It is not a good argument against wind power, and it does not demonstrate any hypocrisy by environmentalists. In fact, a study made in 2012 (overview here) concluded that fossil fuels killed 24 million birds per year in the US, which correspond to 35 times more birds per GWh than wind power kills according to this study. Even though this study and other similar studies are estimates based on assumptions that are far from perfect, they are good indicators that replacing fossil fuels with wind power likely saves birds rather than kills them.
In any case, as this Wikipedia article states, collisions with wind turbines are a minor source of bird mortality compared to other human causes. According to the graph below cats kill 5,600 times more birds than wind power and collisions with powerlines kills 99 times more birds than wind power, and yet we rarely discuss these problems. Even though these numbers are estimates they are mostly confirmed by other studies and analysis, as this overview from MIT and this analysis by Hannah Richie shows. The numbers aren’t the same, but they make the same point. FYI Hannah Richie is the deputy editor and lead researcher at Our World in Data. Our World in Data is a scientific online publication that focuses on large global problems. They are associated with Oxford University and is one of the most respected statistics, analysis and research organizations in the world.
From Wikipedia: Universiteit van Nederland, CC BY 3.0 <https://creativecommons.org/licenses/by/3.0>, via Wikimedia CommonsAn alternative graph taken from Hannah Richie / Our World in Data, using alternative sources essentially showing the same thing. Sources: Loss et al. (2015), (2013), US Fish and Wildlife Service; Subramnayan et al. (2012), American Bird Conservancy (2021).
Wind power has been on the receiving end of false claims, nonsense, and strange rumors for quite some time. It is not the only energy source maligned by false information, but it is an interesting case study in misinformation regarding energy sources. To read about nonsense and rumors about wind power click here.
Superfact 16: Wind power is providing more than a quarter of Texas Power. In 2023, wind represented 28.6 percent of Texas energy generation. In 2022, wind power accounted for about 25 percent of Texas’ energy generation.
I am referring to this fact as a super fact because, it is true, important, and yet it’s a fact that is difficult to believe for many people. That wind power, allegedly a marginal energy source, is successful in fossil fuel loving Texas is hard to believe. I have come across what appears to be well informed people who were certain it was nonsense. However, as you can see from the Texas government links above, it is true, something they could not dispute.
The reason for the success of wind power in Texas is economics, which is another fact that may be surprising to some. Fossil fuels are a major source of income for us in Texas, but everyone also wants to save money. Texas has its own electric grid, it’s deregulated, and organized along free market principles.
When companies sell their energy (to ERCOT) it works like a continuous auction. The one with the lowest price is picked first and allowed to contribute with whatever they are able to and also, of course, considering what the grid-powerlines can carry safely. Naturally, the price of wind in Texas includes federal subsidies, which make it even cheaper.
However, 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 is for the United States not just Texas. I don’t have any numbers, but I’ve heard that for Texas solar is the cheapest .
Average unsubsidized levelized cost of energy. Notice that the light blue line indicates that wind power is pretty cheap. Mir-445511, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons.
Affordability
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.
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 as Texas does.
This is not one of the super fact posts. It is just a post related to an interest of mine that is informational. I volunteer for an organization called Citizens Climate Lobby, or CCL. CCL is a bipartisan organization that works with both Democrats and Republicans to create the political will for climate solutions. During the month of August CCL is promoting what is called electrification. Clean energy is taking the world with storm, but energy / electric power is not the only source of carbon emissions / greenhouse gases.
Take for example, transportation. Most cars still use gasoline and to move towards a fossil fuel free future we must move towards using transportation that uses less fossil fuels such as EV cars. We need to electrify transportation. Another aspect of electrification is replacing gas stoves with induction stoves, installing solar panels, as well as lowering the energy use of your house.
Lowering the energy consumption of your house lowers your emissions. Photo by Frans van Heerden on Pexels.com
EV Cars
At least here in Texas it is quite common to believe that EV cars do not reduce emissions. After all EV cars use electricity from the dirty grid, right? Often this is said to environmentalists and people who care about fossil fuels emissions as if they don’t understand that the electricity for EV cars typically comes from the dirty grid. However, they do know that. In fact, they know a little bit more. EV cars are much more efficient than Internal Combustion Engine cars , or ICE, and therefore the emissions caused by EVs via the electrical grid, even a coal powered grid, is significantly less per mile. In fact, replacing gasoline-powered cars with EVs saves energy, regardless of the energy source used to recharge the EVs. For an ICE 16-25% of the original energy goes to the wheels whereas for an EV 87-91% of the original energy goes to the wheels.
16-25% of original energy goes to the wheels. Data from FuelEconomy.gov, Image by Karin Kirk for Yale Connections.87-91% of original energy goes to the wheels. Data from FuelEconomy.gov, Image by Karin Kirk for Yale Connections.
On the other hand, it takes more energy to manufacture an EV battery for an EV car than it does to produce a combustion engine. So, the production of an electric vehicle does emit more carbon than a petrol car. However, the lower emissions resulting from driving an EV means that an electric car quickly pays back its debt, so to speak. It is typically paid back within two years.
According to Hannah Richie at Our World in Data the statistics show that switching from an average ICE to an equally sized EV will save 1.2 tons of carbon emissions per person and year. That is a lot considering that the average carbon footprint per year is 4 tons worldwide and 14.4 tons per year for an American. Hannah Richie at Our World in Data also states that other environmental damages related to EVs such as mining for minerals are less than mining and extraction for fossil fuel cars, and she claims that the price of lithium-ion batteries has fallen by 98% over the last three decades.
EVs are becoming increasingly common. According to Our World in Data in 2022, 88% of all cars sold in Norway were EVs and 54% of all cars in Sweden were EVs. The United States is lagging a bit at 7.5% but there is a tax credit $7,000.00 for new EVs and a $4,000.00 tax credit for buying used EVs. I should add that we have not yet bought an EV because after I took early retirement, I did not need a car. We just share my wife’s hybrid, which we hardly ever drive.
Induction Stoves
We bought an electric stove, an induction stove, a couple of years ago when our previous stove stopped working. They come with an $840.00 rebate. I’ve read that professional chefs prefer gas stoves. However, our induction stove provides everything we need for our cooking needs and my beer brewing needs and it is easier to clean. If you are a professional chef you may want to be able switch the high heat on and off quicker, but we are not professional chefs even though the food we cook is delicious.
Another downside of an induction stove is that if the power goes out you can’t cook, but that has not been a problem for us. Considering that we get our electricity from a power company, Green Mountain Energy, that utilizes renewable energy, wind and solar, you can claim that our stove is 100% fossil fuel free.
Our induction stove with the lights in the kitchen turned off.
Heat Pumps
Air source heat pumps, which are the most common type of heat pumps, are a great, energy efficient choice for heating your home and water and as well as being low maintenance, they can help to cut your heating costs and lower your carbon footprint. An air source heat pump absorbs heat from the air outside a building and releases it inside. It uses the same vapor-compression refrigeration process and much the same equipment as an air conditioner, but in the opposite direction.
Air-to-air heat pumps provide hot or cold air directly to rooms. Heat pumps are the main way to phase furnaces but are also typically more efficient than other types of heaters and air conditioners and thus they reduce greenhouse gas emissions. There is an up to $8,000.00 upfront discount for heat pumps and a 30% tax credit up to $2,000.00. I should say we do not have a heat pump.
Air heat pump installed on the exterior facade of the old house. Sustainable heating solutions for old construction. Stock Photo ID: 2349325553 by Snapshot freddy.
Rooftop solar
Another great thing that we have been thinking about but do not have yet is rooftop solar. Rooftop solar power system, or rooftop photo voltaic systems, consist of electricity-generating solar panels mounted on the rooftop of a residential or commercial building or structure. Residential rooftop solar power systems typically feature a capacity of about 5–20 kilowatts.
The average American household uses 1.2 kilowatts on average. Most rooftop solar systems are connected to the grid and can feed the extra power into the grid for compensation. I should add this is not entirely without difficulty. There are also hybrid systems which include any combination of wind turbines, diesel generators, and batteries for electricity on demand. There is a 30% tax credit for rooftop solar.
Saving energy is not exactly the same thing as electrification but it is a related topic. If you electrify your home and also reduce your energy needs, you are reducing emissions.
A few years ago, we changed the insulation in our house to reduce our energy needs and our electric bill. It made a difference. We also did weatherstripping, installed three pane windows and high security doors, that were well-insulated and reduced heat-loss. We received significant tax credits for doing this. I don’t remember how much, but it was several thousand dollars. I can add that you get a $150 tax credit for a home energy audit.
What do you think about electrification and energy savings?
Do you have additional ideas for electrification and energy savings?
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