Does trading a gasoline power source for an electric one really help the environment?
When you compare battery to gasoline power, electricity wins hands down.
How to Buy a used Hybrid Car
http://www.ehow.com/how_2157293_buy-used-hybrid-car.html
Dear EarthTalk: If you have an electric or plug-in hybrid car, you’re paying for electricity rather than gasoline all or most of the time. How does that cost compare to a gas-powered car’s cost-per-mile? And since the electricity may be generated from some other polluting source, does it really work out to be better for the environment?
American Report 