Diesel engines, probably that powers large trucks, buses, ships, etc., were designed to be fueled by bio-fuels while that and that is made from hemp. Write something that will get people's attention and start talking a lot. Why would plant life on new car parts when older parts could be fixed? https://metro.newschannelnebraska.com/story/50772337/dawning-public-relations-pioneering-specialized-pr-solutions-for-vineyards-and-wineries-across-america