What is the climate impact of the electricity that will power the electric automobiles?

Both all-electric vehicles and plug-in hybrids have the ability to reduce greenhouse gas emissions. One of the major greenhouse gases is carbon dioxide (CO2).  When emissions from electric power generation are considered, an all-electric vehicle reduces CO2 by over 30% compared to a conventional gasoline vehicle. See the DOE website for further information and for comparisons in your area.