What I found is that widespread adoption of electric vehicles nationwide will likely increase air pollution compared with new internal combustion vehicles. You read that right: more electric cars and trucks will mean more pollution.

And as for that electric car: The energy doesn’t come from nowhere. Cars are charged from the nation’s electrical grid, which means that they’re only as “clean” as America’s mix of power sources. Those are getting cleaner, but we still generate power mainly by burning fossil fuels: natural gas is our biggest source of electricity, and is projected to increase. And coal, while still declining, will remain the second largest source of electricity for some time. (Third is nuclear power, which doesn’t generate emissions but has other byproducts that worry some environmentalists.) Even with large increases in wind and solar generation, the EIA projects that the nation’s electric generating mix will be just 30% renewable by 2030. Based on that forecast, if the EIA’s projected number of electric vehicles were replaced with new internal combustion vehicles, air pollution would actually decrease—and this holds true even if you include the emissions from oil refineries that manufacture gasoline.