[add925]

I understand Methane is one of the biggest contributors to Global Warming.

Methane released to the atmosphere is mainly caused by flatulence.

I also understand CO₂ is a greenhouse gas. It is produced by exhaling and loud talking.

Here is enemy #1 for both greenhouse gases:

Oh, the humanity!

[spectrout]

HaHa

Methane, a product of decomposition of organic matter.