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The environment is defined as the surroundings of a physical system that may interact with other systems by exchanging mass and ENERGY. All the living beings and the non-living things fall under natural environment. The environment is the surrounding that we live in, and so it is our responsibility to PROTECT it from any destruction. Environmental pollution is one of the greatest problems that human society is facing today. Air, water, and SOIL form the three basic areas of environmental pollution.

When there is an undesirable change in the surrounding that has harmful effects on plants and animals, it leads to environmental pollution. A pollutant is a substance that causes pollution. We can have pollutants in liquid, solid or gaseous form. A substance becomes a pollutant when its concentration is greater than the natural abundance and this increase in concentration is either due to human activities or natural phenomenon. There are pollutants which can be degraded and rapidly broken down by natural processes similar to the degradation of vegetables. We also have pollutants which take decades to degrade, once released cannot be EASILY removed. For example, DDT, plastic materials, heavy metals and nuclear waste.

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