Efficiency improvements don't seem to be what the recent push against Exxon is about. In fact, according to Massachusett's lawsuit against them, claiming that e

Efficiency improvements don't seem to be what the recent push against Exxon is about. In fact, according to Massachusett's lawsuit against them, claiming that efficiency improvements in hydrocarbon-powered vehicles reduce CO2 emissions is an illegal attempt to deceive the public because the vehicles still emit CO2.