The word Environment is derived from the French word “Environ” which means all that surrounds us.
Air Pollution: Air pollution is caused by unwanted and rejected things in the atmosphere around us. According to Oxford dictionary air pollution means “The compounds that get mixed with the atmosphere causes dangerous effects on useful plants, animals and human beings”.
Causes for Air pollution: Man’ activities in the name of the modernization have damaged the living species. Man’ activities are also responsible for polluting air, causing dirt, dust and smoke. The Natural disasters like volcanic eruption, forest **** and bacteria also cause air pollution. Man has created industries, vehicles, atomic energy, excessive use of Petrol and other source of energy like Coal, and different types of mining also cause air pollution.
Water Pollution: Water is essential for all living things 2/3 portion on the earth is covered by water, 97.2% of water on earth is mixed with solids and rest 2.8% only is left for drinking purpose.
Water pollution occurs in three different forms:
(i) Inland pollution.
(ii) Underground pollution
(iii) Sea pollution.
Causes for water pollution: Water pollution is due to many factors. Factory wastes, Houses hold wastes and water from agricultural land, all these contributions to water pollution. Biological contamination like gutter water, food processing factories, skin and hide processing factories, insecticides,.drugs, various chemical colours contributes to water pollution.
Noise Pollution: Intolerable sound is considered as sound pollution, because intense sound result in physical and mental stress and also irritation. Sound pollution is also result due to various activities of human begins. Intensity of sound is measured in decibels while talking usual intensity of sound is 60 decibels.
Soil Pollution: The upper most layer of the earth is consisted of “Soil” This soil layer is formed by the natural processes from millions of years. This layer supplies the necessary nutrients essential for the growth of the plants. The soil which feeds the plants is the reason for the existence of all biological system.
The decrease in the quality of the soil and changes in it due to various activities of the humans is called as soil pollution. Soil pollution lessens the productive nature of the soil and destroys the living beings in it and also its rejuvinable process.
