Based on the average U.S.
electricity grid emissions, producing a midsize, mid-range (84 miles per charge) EV similar to a Nissan LEAF typically results in 15 percent greater emissions
than in manufacturing a similar gasoline vehicle. At the same time, replacing
gasoline use with electricity reduces overall emissions by 51 percent over the
life of the car.
A full-size long-range (265
miles per charge) EV similar to a Tesla Model S, increases manufacturing
emissions by 68 percent over the gasoline version.
But during life cycle of this electric vehicle, overall CO2 emissions are 53 percent lower compared with a similar gasoline vehicle.
So, the extra emissions
associated with electric vehicle production are rapidly compensated by reduced
emissions from driving. It is also important to mention that emissions of
manufacturing EVs are falling rapidly as automakers improve production
efficiency and benefit from growing economy of scale.