"There's more methane gas in the atmosphere than there used to be, by every scientific measure. The Obama administration has been trying to stem the increase of this powerful greenhouse gas, but the incoming Trump administration appears bent on keeping the government's hands off methane.
The gas comes from agriculture, especially flooded agricultural lands like rice fields, as well as from the digestive tracts of livestock. But it's also the main component of natural gas; some methane escapes from leaky oil and gas operations.
Whatever the source, scientists have found that, after many years of very little change, concentrations of methane in the atmosphere have increased by 3 percent over the past eight years."