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.
Friday, July 10, 2009
Electric cars are the answer to stopping carbon emissions?
Not so much says the GAO;