Most of the activities of a cell, including growth and division, are carried out by
the use of carbohydrates.
the movement of fats.
the production of proteins.
the storage of water.

cancer   is   essentially   uncontrolled   mitosis   of specialized cells

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.