Thanks to Climate Progress, I now know how our Chevy Volt stacks up against fully gasoline powered cars when it is running on electric power -- which it does most of the time, since we're getting at least forty miles per charge and we rarely drive further than that.
It turns out that even with electricity being partially generated by fossil fuel sources, here in the western part of the United States a gas car would need to get 73 mpg (which none do) to equal the emissions resulting from an electric car powered on the grid. The situation will be even better in 2025, 97 mpg, when more electricity will come from renewable sources.
Admittedly, areas in the mid-west which rely on coal-fired electricity generation produce electric car equivalencies only in the 35 mpg range. Meaning, global warming emissions are nearly as high as a gasoline powered car.
But here in Oregon, us electric car owners can ignore the oft-heard claim that driving around on electricity is just as polluting to the environment as driving around on gasoline. Not true.
Facts are a marvelous thing.