Biodiesel, $3.50 per Gallon

"Biodiesel comes from a variety of sources, most commonly vegetable oil, soybean oil or animal fat, and when mixed with methanol and a catalyst, potassium hydroxide, produces a fuel emitting reduced or eliminated levels of greenhouse gases such as hydrocarbons, carbon monoxide and particulate matter... Each month Piedmont Biofuels, working out of an abandoned metal processing plant in Pittsboro [North Carolina] distributes about 4,000 gallons of biodiesel to its fewer than 100 co-op members." For $3.50 per gallon "co-op members can fill up their tanks environmentally guilt-free with 100 percent biodiesel, B100, in Moncure, Mebane and Pittsboro." Willie Nelson might support it, but federal funding is hard to come by.