What are hydrocarbons and why is it important that crude oil contains them?
Crude oils are valuable for no other reason than that they contain hydrocarbons. It is the hydrocarbon element in crude oil which gives it its energy-bearing properties. Hydrocarbons derive their name from the simple fact that they contain both hydrogen and carbon; it is the hydrogen in hydrocarbons which we use for energy, and the carbon is generally emitted as waste.