(a) How do micro-organisms help in increasing soil fertility ?

(b) How do micro-organisms help in cleaning the environment ?

a)-The soil is home to many animals. Microorganism like some algae , bacteria fungi are present in the soil. Bacteria and fungi present in the soil feed on dead remains of animals and plants and forms humas (which is rich in nutrients and makes the soil fertile). Thus in this way microorganisms make the soil fertile.


b)-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 and they are also helps in conversion of milk into curd by lactobacillus bacteria.