Natural Gas
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- Underground deposits of gases consisting of 50 to 90 percent methane (CH4) and small amounts of heavier gaseous hydrocarbon compounds such as propane (C3H8) and butane (C4H10).
EPA - Cite This Source - This Definition - Underground deposits of gases consisting of 50 to 90 percent methane (CH4) and small amounts of heavier gaseous hydrocarbon compounds such as propane (C3 8) and butane (C4 10).
EPA - Cite This Source - This Definition - Coalbed Methane, Liquefied natural gas (LNG), Liquefied petroleum gas (LPG), Methane (CH4), Natural gas liquids (NGLs), Pentanes plus, Still gas, Synthetic natural gas (SNG)