There is proof that moving to plug-in hybrids could reduce greenhouse gases. From The Environmental News Network:
WASHINGTON — If motorists used rechargeable “plug-in” hybrid-electric vehicles in large numbers, the U.S. could see a significant drop in greenhouse gas emissions by the middle of the century, says a study released Thursday.
Researchers estimated that with a market share of about 60 percent or more plug-ins, the vehicles could help reduce approximately 450 million metric tons in greenhouse gas emissions a year by 2050. The reductions would be the equivalent of removing 82 million passenger cars, or about one-third of the cars currently on the road. [full text]
I know it’s all been said before, but perhaps it’s time to start listening to those tree-huggers clamoring for better cars.