KnowraPetroleumLinked fromLinked fromThe 17 pages that link to Petroleum, each with the reason it gives.All 17Broader topic 1Related 9Narrower topic 4Compared with 3CoalCompared with: Unlike solid coal, petroleum is a liquid fossil fuel used extensively for transport.Natural gasCompared with: Oil is another fossil hydrocarbon resource, but it is liquid and serves different transport markets.Commercial whalingCompared with: Petroleum products displaced many uses once supplied by whale oil.