Solution: Methanogens are the group of bacteria found in both the rumen of cattle and sludge of sewage treatment. Methanogens release methane gas. Microorganisms that create methane as a byproduct of their metabolism are known as methanogens. The majority of methanogens can be found in the guts of both ruminants (such as cows) and humans. Methanogens are also to blame for the presence of methane in belching and flatulence.

Methanogens can also be found in hostile conditions like the ocean’s deepest depths, undersea volcanic vents, and rocks along mid-ocean ridges. They’ve also been discovered under kilometers of ice and in hot, dry desert soil.