From Green Car Reports:
More good news about electric cars in the U.S.: the emissions associated with the electricity used to charge them have fallen.
Based on the latest data on powerplant emissions from the EPA, an electric car on the road in the U.S. now has average emissions as low as an 80-mpg car.
That figure is sales-weighted, meaning it takes into account where electric cars exist today in the U.S.
But that 80-mpg average translates to emissions 10 percent lower than even last year's average, which was 73 mpg—demonstrating that every time any powerplant gets cleaner, so does every single electric car that plugs into the grid it supplies.
[Read more here]
The greening of the grid needs to go hand in hand with the electrification of transport. And that is exactly what's happening. In principle, switching all electricity generation to renewables and all surface transport to electric would cut emissions by 70% or more (land clearing and forest burning would remain the biggest source of CO2 after that, followed by cement and iron steel manufacture, and sea and air transport). It's doable. And vital.