are some physical, chemical or biological changes occur inour physical environment it is known as pollution and thesubstances which brings these changes are known aspollutants. The sources for the pollution can be natural orFollowing are the types of Environmental pollution. When some foreign particles enters the air and deteriorate its qualityis known as air pollution. These particles can be producednaturally or man made. Dust storms, Bacteria and gases ofvolcanic eruptions are examples of natural’s sources ofpollutants. Gases released from the automobile and thechimneys are the example of man made pollutants. Major Air pollutants: Carbon monoxide (CO), Ozone (O3), Nitrogendioxide (NO2), Sulphurdioxide (SO2) and lead. When some foreign particle, organic, inorganic or biological impuritiesare added to the water so that it becomes unfit for use isknown as water pollution. Major Water pollutants:Point Sources: Sewerage system and industrial effluentssources: agriculture. Mining and construction etc. When the productivity of the soil reduces due to the presence ofpollutants in it is known as soil pollution. Man haspolluted the soil by the excess use of pesticides. Major soil pollutants: Pesticides, fungicides and herbicidesAn unwanted and unpleasant sound is known as Noise pollution. Noisepollution affects human being not the physical environment. It reduces the efficiency of the human being. Industries, Transport vehicles, public address systems etc.Marine pollution: Human being has polluted the oceans by adding the oil and wastedisposal in it. The main causes of marine pollution areshore based industries, off-shore drilling, wrecked oiltankers and transport activities. Also the waste dischargedinto the rivers that flows to the ocean is the main reasonof marine pollution. Marine pollution has adversely affectedthe sea life. Transport, oil tankers and industries. It is an increase in the water temperature due to industrial operations(steel industries and power plants). Many industries areusing water as a coolant. Due to which the temperature ofthe water rises. This hot water is then discharged into theenvironment causing a warming of surface water. This canresult in a permanent increase in water temperature. It canalso affect the aquatic system. Major sources: Steel Industries, Power plants and nuclear power plantsPollution caused by the radioactive waste material due to nuclearexplosion is known as nuclear pollution. It can give rise todiseases like skin cancer. Due to the increased numbers ofnuclear plants the nuclear waste disposal has become athreat for the environment. Major Sources: Natural: Cosmic raysNuclear weapons testing