| http://www.w3.org/ns/prov#value | - Petroleum, cracking and polymersPetroleum is a very complex mixture of hydrocarbons and other organic chemicals, but consisting mainly of straight-chained alkanes. (Petroleum, from the Greek for oil from rocks, is the correct term although crude oil or even just oil are also very commonly used.)The lower alkanes (except ethane) in petroleum can be used as fuels (methane and LPG, petrol, paraffin,
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