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Natural Gas, a Non-renewable Resource

What is natural gas?

Natural gas is a naturally occurring fossil fuel found by itself or near crude oil deposits in deep underground pockets. These pockets, formed by porous rock, are 3,000 to 15,000 feet below the earth’s surface. Natural gas is not a petroleum product. It is a gaseous mixture of simple hydrocarbon compounds, primarily composed of methane (CH4) with minor amounts of ethane, propane, butane, and pentane. Because the energy density of natural gas is low, when used as a fuel it is either compressed (CNG) or liquefied (LNG).