Pollution

 

Pollution

Pollution is the introduction of harmful materials (pollutants) into the environment. Pollution can be due to natural causes, such as volcanic eruptions, forest fires, etc. or due to human activities, such as carbon emission, industrial runoff, etc.

Air Pollution

Introduction of pollutants, organic molecules, or other hazardous substances into the earth’s atmosphere.
Sources:
a) Natural – forest fire, dust storms, and volcanic activity
b) Man-made – power plants, homes, industries, oil refineries, and  transportation

Ozone Layer Depletion

The ozone layer protects the Earth from the sun’s ultraviolet (UV) radiation. CFCs released into the atmosphere react chemically with ozone molecules and deplete the layer.