Friday, July 10, 2009

Electric cars are the answer to stopping carbon emissions?

Not so much says the GAO;

It’s a beautiful theory — highways full of electric cars emitting no greenhouse gases or pollutants after being plugged into an outlet in our garages overnight. The problem, according to a new Government Accountability Office report, is that the effort may only shift the problem somewhere else.

“If you are using coal-fired power plants, and half the country’s electricity comes from coal-powered plants, are you just trading one greenhouse gas emitter for another?” asks Mark Gaffigan, co-author of the GAO report. The report itself notes: “Reductions in CO2 emissions depend on generating electricity used to charge the vehicles from lower-emission sources of energy.”

The GAO report says a plug-in compact car, if recharged at an outlet drawing its power from coal, provides a carbon dioxide savings of only 4% to 5%. If the feeling of saving the environment from driving an electric car causes people to drive more, that small amount of savings vanishes entirely.





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