It is the contamination of the atmosphere by the harmful gases, liquids, or solid wastes that can endanger human health and health and welfare of plants and animals. Air pollution from vehicles and industried have resulted into diseases liek hypertension, lungs problem and high blood pressure. It adversely affect, the working capacity of city people and also reduces the average life expectancy as well.
Sources of air pollution:
1. industrial exhausts which contain carbon monoxide, sulphur dioxide, oxides of nitrogen, chlorine, fluorine etc.
2. vehicles produce harmful gases such as carbon monoxide, carbon dioxide, oxides of nitrogen, lead ,ethane etc.
3. Burning solid fuels such as firewood, agricultural wastes, coal etc also cause air pollution.
'4. Chlorofluorocarbon(CFC) and ammonia released by the refrigerators, air conditioners etc.
5. Different biocides such as pesticides, insecticides, fungicides etc.
6. Electric power plants, burning fossil fuels , tobacco smoke etc.
Effects of air pollution:
1. CFCs cause the depletion of ozone layer hence allowing harmful UV rays to enter earths surface in more quantity.
2. Increase in carbon dioxide in air causes global warming due to green house effects.
3. Oxides of sulphur and nitrogen in air cause acid rain.
4. Smokes and dust particles present in air cause irritation in respiratory system may cause bronchitis, allergies, lung cancer etc in human beings.
5. Polluted air has toxic effect on animals and human beings. For example CO combines with haemoglobin of blood forming carboxyhaemoglobin that reduces oxygen carrying capacity of blood that causes laziness, nervousness and cardiac disorder, vision effect etc.
Control of air pollution:
1. Mass afforestation programs.
2. Use of public vehicles should be prioritized instead of private vehicles.
3. Electric stoves should be used .
4. Gases should be treated properly from industried before releasing into the atmosphere.