Methane is naturally produced by bacteria in ________ environments.
A)anaerobic
B)high pressure
C)very cold
D)isotopic

Question

Quizplus · Accepted Answer

Methane is produced by certain types of bacteria that thrive in anaerobic (oxygen-free) environments such as wetlands, rice paddies, landfills, and the guts of ruminant animals like cows and sheep. Methane is also produced by geological sources such as natural gas deposits and coal seams under high pressure and temperature, but these are not "naturally produced by bacteria." Methane can exist in very cold environments like the Arctic permafrost or ocean sediments, but the cold temperature is not the primary factor for its production. Isotopes are variations of chemical elements, and they are not related to methane production by bacteria.

Methane Is Naturally Produced by Bacteria in ________ Environments