Diesel expected that his engine would be powered by vegetable oils (including hemp) and seed oils. At the 1900 World's Fair, Diesel ran his engines on peanut oil. Later, George Schlichten invented a hemp 'decorticating' machine that stood poised to revolutionize paper making. Henry Ford demonstrated that cars can be made of, and run on, hemp. Evidence suggests a special-interest group that included the DuPont petrochemical company, Secretary of the Treasury Andrew Mellon (Dupont's major financial backer), and the newspaper man William Randolph Hearst mounted a yellow journalism campaign against hemp. Hearst deliberately confused psychoactive marijuana with industrial hemp, one of humankind's oldest and most useful resources. DuPont and Hearst were heavily invested in timber and petroleum resources, and saw hemp as a threat to their empires. Petroleum companies also knew that petroleum emits noxious, toxic byproducts when incompletely burned, as in an auto engine. Pollution was important to Diesel and he saw his engine as a solution to the inefficient, highly polluting engines of his time. In 1937 DuPont, Mellen and Hearst were able to push a "marijuana" prohibition bill through Congress in less than three months, which destroyed the domestic hemp industry.<quoted text> I like the smell of diesel. It smells like money to me. My 690 JD is diesel My old bulldozers are diesel. Ive got a MD Farmall thats diesel it has spark plugs. It has a ignition and carb on one side of the engine and fuel injection on the other. you start it up on gasoline andit runs at a high idle. when it warms up you pull a lever and it shuts off the gas increases compression and it runs on diesel. Crude oil is a natural thing. It is one of the gifts of nature, all mans activities do is rearrange what is already naturally here. you cant make something from nothing- You cant make something into nothing- for every action there is & equal &opposite reaction. That means its a wash Even Steven. and CO2 is not a pollutant humans breathe in oxygen and exhale CO2. Plants need CO2. Plants take in CO2 and release oxygen.