what is methan gas
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.