Tuesday, May 12, 2020

Environmental Pollution, Problems and Control Measures

Environmental pollution, problems and control measures A. Introduction and definition of environmental pollution – We know that, a living organism cannot live by itself. Organisms interact among themselves. Hence, all organisms, such as plants, animals and human beings, as well as the physical surroundings with whom we interact, form a part of our environment. All these constituents of the environment are dependent upon each other. Thus, they maintain a balance in nature. As we are the only organisms try to modify the environment to fulfill our needs; it is our responsibility to take necessary steps to control the environmental imbalances. The environmental imbalance gives rise to various environmental problems. Some of the environmental†¦show more content†¦Ozone (O3) depletion has resulted in UV radiation striking our earth. The gaseous composition of unpolluted air The Gases Parts per million (vol) Nitrogen 756,500 Oxygen 202,900 Water 31,200 Argon 9,000 Carbon Dioxide 305 Neon 17.4 Helium 5.0 Methane 0.97-1.16 Krypton 0.97 Nitrous oxide 0.49 Hydrogen 0.49 Xenon 0.08 Organic vapours ca.0.02 Harmful Effects of air pollution – (a) It affects respiratory system of living organisms and causes bronchitis, asthma, lung cancer, pneumonia etc. Carbon monoxide (CO) emitted from motor vehicles and cigarette smoke affects the central nervous system. (b) Due to depletion of ozone layer, UV radiation reaches the earth. UV radiation causes skin cancer, damage to eyes and immune system. (c) Acid rain is also a result of air pollution. This is caused by presence of oxides of nitrogen and sulfur in the air. These oxides dissolve in rain water to form nitric acid and sulfuric acid respectively. Various monuments, buildings, and statues are damaged due to corrosion by acid present in the rain. The soil also becomes acidic. The cumulative effect is the gradual degradation of soil and a decline in forest and agricultural productivity. (d) The green house gases, such as carbon dioxide (CO2) and methane (CH4) trap the heat radiated from earth. This leads to an increase in earth’s temperature. (e) Some toxic metals and pesticides also cause airShow MoreRelatedEnvironmental Activism in China1130 Words   |  4 PagesEnvironmental Activism in China I. Introduction China witnesses rapid economic growth after the economic reform in 1978. This economic development brings people great wealth and also a huge cost on the environment. Water and air pollution are among most serious environmental problems, others like soil retrogression and degradation, deforestation, and human health problems coming with these issues are becoming more severe too. 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