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Methane gas is a form of greenhouse gas that is over 20 times more effective than carbon dioxide in trapping heat in the atmosphere. Methane gas can remain in the atmosphere for about 9 to 15 years. Methane is emitted from a number of natural and human-influenced sources.ethane gas is a form of greenhouse gas that is over 20 times more effective than carbon dioxide in trapping heat in the atmosphere. Methane gas can remain in the atmosphere for about 9 to 15 years. Methane is emitted from a number of natural and human-influenced sources.
Natural gas is an energy source often used for heating, cooking, and electricity generation. It is also used as fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals.hen gas is associated with petroleum production it may considered a byproduct and be burnt as flare gas. The World Bank estimates that over 150 billion cubic metres of natural gas are flared or vented annually.