Do you think microbes can also he used as source of energy? If yes. how?

Do you think microbes can also be used as source of energy ? If yes, how ?

Microbes can also be used as source of energy. Substantiate with suitable exmples.

How microbes can be used as biofertilizers?

Do you think microbes enrich the fertility of soil ? If yes, how ?

Do you think that friends can Influence one to take alcohol/drugs? If yes. how may one protect himself/herself from such an Influence?