Question

how do microorganisms to eat the environment clean

Answer 1

Yes,Micro organism helps to keep our environment clean because they help to compose the matter with natural process that is done by bacteria and in this way it helps in making manure for soil This process is known as biodegrable.also helps in conversion of milk into curd.     

Answer 2

microorganisms are decomposers hence convert complex organic substance into simpler ones thus it cleans the environment.
Hope it helps!