Question

what are the primary sources of methane in the atmosphere? select all that apply a plant materials decomposing b biochemical processes in stomachs c interactions between atmospheric oxygen and uv rays d no natural sources, made by human activities.

Explanation:

Methane is produced when plant materials decompose in anaerobic conditions. Also, biochemical processes in the stomachs of ruminant animals (enteric fermentation) produce methane. Interactions between atmospheric oxygen and UV - rays do not produce methane. Methane has both natural and human - made sources.

Answer:

a. Plant materials decomposing
b. Biochemical processes in stomachs