Electrics are improving on emissions and cost, but not enough to make driving an electric car the smart choice for consumers looking to save time and reduce environmental impacts. According to a new analysis, biofuels still reign. If you’re driving an electric car, you’re driving the grid, and the grid isn’t all that green, yet.

Why the Surprise?

How is this possible? Didn’t this landmark study by the Union of Concerned Scientists found that, over a 15-year vehicle lifetime, a battery electric vehicle would reduce emissions by half compared to conventional gasoline-based vehicles. However, there are two myths buried in the assumptions in the survey.