Edited sentence: And Rudolph Diesel's diesel engines burned peanut oil.Demand for fats and oils skyrocketed during WWI and WWII due to several factors: Nitroglycerin, made from fats and oils, was used to make bombs and cordite to fight the war.Diverting waste cooking oil to fuel use will effectively convert food to fuel.It is not a "waste" product.Organized collection and processing of waste cooking oil began in the United States in the 1920's when serious shortages of vegetable oil occurred.Sales of margarine, made from vegetable oil, skyrocketed due to price and military use.Today nearly 100% of all waste cooking oil is purchased from restaurants