Petroleum

Petroleum is a liquid. Crude oil is unrefined liquid petroleum that has been pumped from underground. Refined petroleum contains a mixture of various hydrocarbons, which is a molecular compound containing only atoms of the elements hydrogen and carbon. Petroleum is mostly used as a fuel and about 89% of all petroleum is burned as fuel. Its other major use is as a raw material manufacturing CDs, sports equipment, clothing, automobile parts, plastic charge cards, etc. Petroleum is a nonrenewable resource because the hydrocarbon fuel is used up and takes millions of years to replace it.