The presence  into the environment of a substance which has harmful or poisonous effects.

Pollution is an undesirable change in physical, chemical or biological characteristics of air, land, water or soil. The agents that bring about such an undesirable change are called pollutants.

To control pollution, the Government of India passed environment act in 1986.

  1. Air pollution
  2. Water pollution
  3. sound pollution
  4. Light Pollution
  5. Noise Pollution
  6. soil pollution
  7. Mercury pollution
  8. Radioactive Pollution