http://news.bbc.co.uk/1/hi/business/6571993.stm American oil company ConocoPhillips and Tyson Foods, the world's biggest meat producer, have announced that they will produce diesel from pork fat. Cows and chickens will also be transformed to power motor vehicles. Since 2005, US oil companies can benefit from a dollar-per-gallon tax incentive for creating renewable fuel from animal carcasses and other food wastes. they are going to be getting tax breaks for turning animals into fuel so would you like to travel in a car run on slaughtered animals . Also for people who think this is a good idea think of the EROEI energy return on energy invested . Your using loads of land and energy to grow feed to feed animals to kill them to make fuel, its very likely your using more energy to produce less energy .