What is causing the rapid rise in methane emissions?

Yale environment 360: New research finds some surprising culprits and shows that fossil-fuel sources have played a much larger role than previously estimatedThe stomachs of cattle, fermentation in rice fields, fracking for natural gas, coal mines, festering bogs, burning forests — they all produce methane, the second most important greenhouse gas, after carbon dioxide. But how much? And how can we best cut these emissions? And is fracking frying the planet, or are bovine emissions more to