Hydrocarbon waste is waste matter containing hydrocarbons. Hydrocarbons are molecules that are in all products made using fossil fuels. A hydrocarbon is the simplest organic compound containing only carbon and hydrogen. The majority of hydrocarbons found on earth naturally occur in crude oil, where decomposed organic matter provides an abundance of carbon and hydrogen. The most common types of hydrocarbon waste are tires, rubber products, plastics, asphalt, asphalt roof shingles, automobile shred residue (ASR) and diapers.