Environmental Impact Evaluator's Knowledge of Laws and Regulations: Water Pollution and Health

water pollution is mainly caused by pollutants produced by human activities, including industrial pollution sources, agricultural pollution sources and living pollution sources industrial wastewater is an important source of pollution in the waters, with large quantities, wide areas, complex compositions, large toxicity, not easy to purify, difficult to treat and so on agricultural sources of pollution include livestock manure, pesticides, fertilizers and so on In agricultural sewage, one is organic matter, plant nutrients and pathogenic microorganism content is high, and the other is high pesticide, fertilizer content According to relevant information, 100 million hectares of arable land and 2.2 million hectares of grassland, the annual use of pesticides 1.149 million tons China is one of the most serious countries in the world, the annual topsoil loss of about 5 billion tons, resulting in a large number of pesticides, fertilizers with topsoil into rivers, rivers, lakes, reservoirs, and then the loss of nitrogen, phosphorus, potassium nutrients, so that 2/3 of the lakes by different degrees of eutrophication pollution, resulting in algae and other biological abnormal reproduction, causing the water transparency and dissolved oxygen changes, resulting in deterioration of water quality the source of life pollution is mainly the use of various detergents and sewage, garbage, feces, etc in urban life, mostly non-toxic inorganic salts Domestic sewage contains nitrogen, phosphorus, sulfur, pathogenic bacteria about one-third of China's industrial wastewater and more than 90% of domestic sewage discharged into the waters without treatment each year Of the more than 1,200 rivers monitored nationwide, more than 850 are currently contaminated and more than 90 per cent of urban waters are polluted, resulting in the extinction of fish and shrimp in many river sections, with only 32.2 per cent of rivers meeting national and secondary water quality standards Pollution is moving from shallow to deep, groundwater and nearseawater are being polluted, and the water we can drink and use is unknowingly reducing The increasing water pollution of the world's number one killer has posed a major threat to the survival and safety of mankind and become a major obstacle to the sustainable development of human health, economy and society According to world authorities, 8 per cent of all diseases in developing countries are caused by drinking unsanitary water, which kills at least 20 million people worldwide each year As a result, water pollution has been called "the world's number one killer" Editor's Recommendation: 2015 Environmental Impact Assessment Engineer's Knowledge Point (Responsible Editor: lqh) 2 pages, current page 1 page 1 Page 1 Previous Page Next