Industrially produced methane comes from burning fossil fuels such as natural gas, which is the primary component of natural gas, which is burned to heat many homes and businesses. Methane is also released from active coal mines, and even abandoned coal mines that are no longer being used.

Remarkably, it is domestic hoofed-mammals like cows and sheep that are amongst the planet's major emitters of methane. By eating and digesting large quantities of grass, then burping and farting methane into the atmosphere, livestock contribute 21% of human-induced methane emissions. Currently, agricultural scientists are working to create special diets for cows that attempt to reduce this harmful waste, as beef and dariy cattle are responsible for 75% of the methane produced from livestock each year...

And for the Jesus Deniers... He is already here... So think again...