One of my co-workers and I got into a good-natured debate about the efficiency of my Prius Prime. In addition to boasting that I used no gasoline at all last month (and only 41.6 L—11 gallons—all year), I pointed out that Illinois gets a majority of its power from nuclear fission, so yes, my car is net-positive on carbon emissions. He challenged me on that, saying that Illinois uses a lot of coal and natural gas, obviating the benefits of my car's electric drive.
Well, the New York Times has a really cool interactive piece today showing how each US state's electricity generation mix has changed this century. And it turns out, I was right:
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Nuclear energy has been Illinois’s top source of power generation for much of the last two decades, accounting for about half of the electricity produced in the state during most years. Coal was long the second-largest power source, briefly surpassing nuclear as the top generation fuel in 2004 and again in 2008. But coal’s role in the state power mix has declined significantly in recent years as older coal-fired power plants have retired or been converted to burn natural gas. Both natural gas and wind generation have grown over the past decade, and last year gas surpassed coal as the second-largest source of power in the state.
So, in fact, Illinois gets 68% of its power from renewables and only 15% from coal—and wind power is going up while coal and gas go down. And down at the bottom there, it looks like solar is finally making a debut, at about 2% but going up.
Vermont's graph, though, surprised me. It turns out that all of Vermont's power generation has been renewable for since 2001. But since the Vermont Yankee Nuclear Power Station closed in 2014, the mix went from 76% nuclear/16% hydro/7% biomass to 51% hydro/19% solar/16% biomass/15% wind today.
We really need to start building more nuclear power plants, though:
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