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2. Petroleum product - Wikipedia

   en.wikipedia.org/wiki/Petroleum_product

   Petroleum products are materials derived from crude oil as it is processed in oil refineries. Unlike petrochemicals, which are a collection of well-defined usually pure organic compounds, petroleum products are complex mixtures. [1] Most petroleum is converted into petroleum products, which include several classes of fuels. [2]

3. Natural gas - Wikipedia

   en.wikipedia.org/wiki/Natural_gas

   Natural gas can be found in underground geological formations, often alongside other fossil fuels like coal and oil (petroleum). Most natural gas has been created through either biogenic or thermogenic processes. Thermogenic gas takes a much longer period of time to form and is created when organic matter is heated and compressed deep underground.

4. Petroleum industry - Wikipedia

   en.wikipedia.org/wiki/Petroleum_industry

   Some petroleum industry operations have been responsible for water pollution through by-products of refining and oil spills. Though hydraulic fracturing has significantly increased natural gas extraction, there is some belief and evidence to support that consumable water has seen increased in methane contamination due to this gas extraction. [39]

5. 15 Biggest Gas Companies in the World - AOL

   www.aol.com/news/15-biggest-gas-companies-world...

   The firm sells petroleum products, natural gas liquids, and jet fuel for the U.S. military. Valero Energy Corporation (NYSE:VLO) raked in $114 billion in 2021, and the firm owns 15 refineries that ...

6. Petroleum - Wikipedia

   en.wikipedia.org/wiki/Petroleum

   Petroleum [a] is a naturally occurring yellowish-black liquid mixture. It consists mainly of hydrocarbons, [1] and is found in geological formations. The term petroleum refers both to naturally occurring unprocessed crude oil, as well as to petroleum products that consist of refined crude oil.

7. Liquefied petroleum gas - Wikipedia

   en.wikipedia.org/wiki/Liquefied_petroleum_gas

   LPG is composed mainly of propane and butane, while natural gas is composed of the lighter methane and ethane. LPG, vaporised and at atmospheric pressure, has a higher calorific value (46 MJ/m 3 equivalent to 12.8 kWh/m 3) than natural gas (methane) (38 MJ/m 3 equivalent to 10.6 kWh/m 3), which means that LPG cannot simply be substituted for ...