(a) Air Pollution: Air pollution refers to injection of harmful substances in the atmosphere which results in lowering the quality of air we breathe in. Air pollution is a serious problem for the whole world as it has created a hole in the ozone layer of atmosphere. Smoke chemicals emitted by factories and smoke emitted by vehicles are the main causes of air pollution.
(b) Water Pollution: Water pollution refers to the dumping of chemical and other wastes in rivers, lakes, etc. Generally the factories located near the rivers, streams dump their waste into rivers, lakes, streams, etc. thereby causing pollution of water.
(c) Land Pollution: Land pollution refers to dumping of toxic waste in the land which affects the fertility of land and makes it unfit for agriculture. There are two aspects of land pollution one is how to improve the quality of land which is already damaged and second is how to check further contamination of land. In order to check land pollution, methods of solid waste disposal are used. The combustible wastes are now separated and are used as fuel in industrial boilers, etc.
