Сочинение на тему-загрязнение окружающей среды.на

Entry and accumulation in the environment of different substances and compounds in concentrations exceeding the natural (background ) level . environmental pollution in dos. associated with industrial activity of man , although sometimes it is due to natural causes ( volcanoes , dust storms , forest fires , dos. contaminants - industrial enterprises (especially metallurgical and chemical ) , combined heat and power , transport , urban and agriculture . in russia, large pockets of air pollution generated in the industrial centers (norilsk , magnitogorsk , lipetsk and cherepovets, nizhny tagil , etc.) and cities - millionaires . in large cities, pollution by 70% due to the exhaust of vehicles , which contain approx. 200 toxic substances (including carbon monoxide, nitrogen oxides , lead compounds ) . in cities and their surroundings loss occurs ( precipitation ) of atmospheric pollutants on the ground, which leads to the formation of geochemical anomalies. some heavily polluted river - cf. during the volga , don , rivers of the kola peninsula , the lower reaches of the amur.environmental pollution by industrial enterprisesenvironmental pollution by industrial enterprises    pollution affects the health of humans, causing a number of serious diseases. pollution levels monitored values ​​of maximum permissible concentration (mpc) , the maximum permissible emissions (mpe ), etc. the greatest threat to the health of the radioactive contamination of the environment - the result of accidents at nuclear power plants in the world and conducted nuclear tests in 1850 . especially dangerous isotopes of cesium and strontium that accumulate in the soil and reach the food chain to humans. also radionuclides have mutagenic pesticides and heavy metals . environmental contamination can be solved as a result of monitoring the state of the environment , comprehensive utilization of resources , the introduction of low-and non-waste production , the creation of sewage treatment plants

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