POLLUTION

Pollution can be defined as any unwanted addition of substances to air, water, soil, or food that threatens the health, survivals or activities of humans or other living organisms. Pollution can enter the environment naturally or through human activities.

Pollutants when released into the environment gain entry into soil by absorption, into water by dissolution and into air by evaporation. Both air and water are effective means of transfer and transport of the waste gases and other materials. Soils on the other hands are stationary entities, which are indirectly effected by pollution of water and air.

As soon as a pollutants enter the environment, agencies of transfer, transport and transformation start acting on them almost simultaneously. while the pollutants are dispersed in the medium and diluted, they also undergo a bio tic transformation where in solar radiation, water and air play important roles.

The pollutants may thus be broken down or altered in the a bio tic environment itself.