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Please purchase PDFcamp Printer on http://www.verypdf.com/ to remove this watermark. MODULE - 4 Pollution vironment and Health 184 26 Notes POLLUTION You have already learnt about the environment and its components in the earlier lessons. You have also studied the importance of maintaining a life-supporting environment in class 10. However, the environment has undergone many changes over the period of time. Population explosion in the recent times has resulted in a number of environmental problems. The population of India has crossed the figure of 1.4 billion and the world population is estimated to have touched the 6 billion mark. To meet the demands of food, housing and energy, environmental resources are being exploited at a fast pace. Over-exploitation of resources and human activities has resulted in many environmental problems, such as deforestation, destruction of wild life, air, water, land and noise pollution, diminishing fossil fuels (oil, coal and natural gas), concentration of pesticides in alarming proportions in the bodies of organisms, and depletion of ozone layer and global warming. In this lesson, you will learn about various kinds of environmental polluton, their causes effects and control. OBJECTIVES After completing this lesson, you will be able to : l define pollution; l list various types of pollution and mention their sources; l describe effects of air, water and soil pollution on flora and fauna; l describe methods of control of air, water and soil pollution; l describe methods of nuclear and solid waste management l describe the causes and effects of sound pollution; l describe the causes and effects of radiation pollution; l discuss rates of entry and translocation of pollutants in human body. 26.1 POLLUTION We perform a number of daily activities such as bathing and washing of clothes with soaps and detergents. By doing so we add some chemical residue to water BIOLOGY
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