Methane is an irrelevant greenhouse gas outside of the laboratory and in the atmosphere because it only absorbs and retains Earth’s otherwise escaping long-wave energy to space in two very specific short radiation bands @ 3.3 & 7.5 microns of the much larger electromagnetic spectrum, where that energy in those narrow bands is also absorbed by water vapor. Water vapor is 5000 to 10,000 times as prevalent in the atmosphere as methane and has long since saturated the energy absorption factor in those narrow spectral bands leaving virtually no energy for which methane can compete and certainly not enough to worry about increased levels of methane capturing. Stated another way, the only source for methane capture of energy in the atmosphere has long ago been exhausted by humidity. What it can do in the laboratory (25-84 times more energy absorbent than CO2 depending on what you read) without competing gases absorbing IR radiation, it cannot do in the atmosphere because there is no energy left to capture in those bands in which it can only absorb energy that might otherwise escape Earth into the void of outer space.

For the reasons stated, fear of methane affecting climate change is scientifically illusory and nonsense. Despite what you have heard and read methane has no discernible effect in the atmosphere on Earth’s temperature or climate.

Read more aggregate of the science involved from these sources (math & charts, if you are interested) —
http://wattsupwiththat.com/2014/04/11/methane-the-irrelevant-greenhouse-gas/

http://www.americanthinker.com/articles/2015/01/whit_house_methane_madness.html

http://wattsupwiththat.com/2015/10/10/stop-the-devastation-of-peoples-lives-by-speculating-with-no-data-remembering-cattle-and-methane-emissions/