So how come I have yet to hear how much the heat produced by automobiles may (or may not) affect the planet? I mean, in March 2005, US Gasoline consumption was 320,500,000 gallons PER DAY! At 125,000 Btu per gallon, that's 14,622,812,500,000,000 Btus per year! By my calculations, which could very well be wrong, that is as more energy produced EACH DAY by gasoline consumption, than the Seabrook Nuclear Powerplant produces in one year! And that's US consumption only.