Why electric cars aren’t always greener
Solid article from the Economist on the importance of taking into account both the car you replace (particularly relevant since a lot of the environmentally conscious people considering buying electric cars probably already have fairly green vehicles) and the energy source.
One interesting fact about the argument that one might simply be switching from tailpipe emissions to coal plant emissions: while I don’t know much about how the two compare regarding the impact on climate change, my intuition is that the direct impact on human health is probably not the same. This is because the populations surrounding the dirtiest coal plants are naturally shrinking. From a study in Regional Science and Urban Economics:
pollution levels are higher in counties with coal fired plants, and that the population is moving away from regions such as the Midwest where the dirtiest coal fired power plants are located. Population growth is taking place in the South and West. Especially in the Western region, the power plants are newer and cleaner and less likely to be coal fired.