Electricity is the magical elixir of our modern society. Without it, our cities would cease to function. Imagine having only natural gas lighting in your home or having to start up an oil-powered coffee maker for that morning cup of caffeinated delight. Electricity delivers ample power when and where we need it. But it also creates over a quarter of greenhouse gas emissions in the USA. Modern society is addicted to electricity, and its popularity provides a clear opportunity for mitigating climate change using electricity as a pressure point.
Energy falls into two categories, primary and secondary. When you hop in your conventional car for a quick trip to Starbucks, fire up the engine, and back out of the driveway, you use primary energy. The engine burns gasoline, thus making the car move. If you have a Tesla Model 3, then the car runs using secondary energy, electricity. The production of electricity requires generating it from primary sources like natural gas, coal, solar, wind, hydropower, and nuclear. Primary energy drives the turbines that produce electricity. Therefore, electric power is not clean and green if its primary source emits greenhouse gases.
The pressure point
Fossil fuel use for electrical power generation is wide-spread, and the U.S. Environmental Protection Agency calculates that electricity accounts for about 27% of the total U.S. greenhouse emissions. Coal and natural gas are the most common primary fuels for electric power plants. Also about two-thirds of the electricity produced worldwide comes from these sources.
Electricity demand is growing, and this growth provides a golden opportunity for significant reductions in greenhouse gas emissions. Clean electric power has a knock-on effect, and movement towards cleanly-sourced electricity reduces the carbon footprint of electric cars, consumer goods, homes, offices, factories, and more. But the real leverage that electricity offers is through the regulatory regime surrounding it. Utilities are prisoners of both state regulators and federal policy. Regulators, in turn, bend to the prevailing political wind. But politicians are elected by the people, and it is here we see the pressure point. Voters can mandate clean energy through the ballot box and force actions with far-reaching consequences that significantly mitigate climate change.
Going Green
Electric cars are popular, and many people point to them as emissions-free vehicles that are good for the environment. But the answer is not that simple. Using an electric vehicle in West Virginia reduces your carbon footprint by about 20 percent compared to gasoline-powered cars. However, carbon reduction for the same vehicle rises to 92 percent in the State of Washington. These differences reflect the sources of primary energy used. West Virginia is heavily dependent on coal-powered electricity plants, but Washington relies on significant hydroelectric power.
So, what is green electricity? It takes on two forms. One is electricity produced via fossil fuels, but the removal of all greenhouse gas occurs at the power plant. This idea is not as far-fetched as it seems. On the outskirts of Houston, Texas, a prototype natural gas electric power plant is set to produce emissions-free electricity using Carbon Capture, Utilization, and Storage (CCUS) technology. Assuming the prototype works, then the technology becomes a viable option for a green, clean future.
Another path towards green electricity is through generating it from clean primary energy. The U.S. Energy Information Administration (EIA) divides renewable energy into five categories: biomass, hydropower, geothermal, wind, and solar. These all represent energy sources that are naturally replenishing, but this does not necessarily make them clean.
Wood is part of the biomass category, but burning wood releases carbon dioxide (CO2). However, hydro, wind, solar, and geothermal form a subset of renewable energy sources that classify as “clean.” These sources emit no greenhouse gases. Hydroelectricity traditionally provided the largest source of clean U.S. electricity, but in 2019 wind power surpassed hydro. During the past two decades, wind-generated electricity moved from being a negligible power source to supplying over 40% of U.S. renewable energy.
The wind beneath our wings
Humans unlocked wind power when our ancient ancestors first used sails to power their boats across open waters. But harnessing that natural energy and converting it into electricity on a commercial scale is a relatively new phenomenon. It was a long slog from medieval Dutch windmills to modern wind power. But the technology for building massive wind turbines, capable of supplying industrial power, finally came into its own in the early 1980s.
These modern windmill behemoths rise hundreds of feet above the ground and support massive blades up to 200 feet (60 meters) in length. Those blades spin as the wind blows across them, turning the turbines, and producing electricity.
The USA is the second-largest producer of wind-generated electricity in the world, surpassed only by China. According to the U.S. Energy Information Agency, approximately 58,000 wind turbines pump out electricity to U.S. homes, businesses, and cities, and the average turbine supports about 470 homes. The biggest producers of wind-generated power in 2019 were Texas, Oklahoma, Iowa, Kansas, and California. They produced nearly 60% of the total U.S. wind-generated electricity.
Land-based wind farms significantly altered the face of U.S. energy production over the last two decades, but the industry now looks to the oceans for the next surge in wind power.
Offshore Wind
The quote “If you build it, he will come” (1989 – Field of Dreams) does not apply to wind farms. The wind doesn’t come to us, so we must go to the wind. Geography is all-important in harnessing wind power; perhaps “If the wind comes, we will build it” is a better quote for today. Because of the different ways land and oceans deal with heat, coastal transition zones are lucrative wind power locations. This phenomenon is not lost on the clean energy business, and the next big foray into wind-generated electricity will be offshore wind farms. The U.S. East Coast is a hot spot for developing wind power projects.
A map of where the wind blows (below) demonstrates why wind energy companies are flocking to the coastal seas from Virginia to Massachusetts. But geography is only half of the charm for this area. That northeast stretch of the eastern seaboard is the most densely populated region in the country. So an offshore wind farm close to a region with enormous power demands creates a win-win situation. The map also shows why the mid-continent is the location for four of the five states currently producing the most onshore U.S. wind power.
Map showing wind speeds at 262 feet above the earth’s surface. Purples and reds show the highest wind speeds, making the mid-continent and East Coast prime locations for harnessing wind power. (Source: NREL)
ArcheanWeb:
Electrical power, a climate change puzzle (Source: ArcheanWeb) – https://archeanweb.com/2020/06/26/electrical-power-a-climate-change-puzzle/ Also:
A Breezy Future: The Rise Of Wind Power (Source: ArcheanWeb) – https://archeanweb.com/2020/06/17/a-breezy-future-the-rise-of-wind-power/ Also:
U.S. East Coast, a hot spot for clean energy (Source: ArcheanWeb) – https://archeanweb.com/2020/07/14/u-s-east-coast-a-hot-spot-for-clean-energy/ Also:
States take the lead and move to clean energy (Source: ArcheanWeb) – https://archeanweb.com/2020/07/15/states-take-the-lead-and-move-to-clean-energy/ Also:
Sources:
Computing America’s Offshore Wind Energy Potential (Source: Office of Energy Efficiency $ Renewable Energy) – https://www.energy.gov/eere/articles/computing-america-s-offshore-wind-energy-potential Also:
Green New Deal: Is 100% Renewable Energy Even Possible, Or Good For The Environment? (By John Merline; Investor’s Business Daily) – https://www.investors.com/politics/commentary/renewable-energy-possible-good-environment/ Also:
Who is willing to pay more for renewable energy? (By Abel Gustafson, Matthew Goldberg, Seth Rosenthal, John Kotcher, Edward Maibach, and Anthony Leiserowitz; Yale Program on Climate Change Communication) – https://climatecommunication.yale.edu/publications/who-is-willing-to-pay-more-for-renewable-energy/ Also:
Feature Image: Diablo Dam (Modified) – By © Steven Pavlov / https://commons.wikimedia.org/wiki/User:Senapa, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=20838767
