Water pollution is a certain amount of sewage， waste water， all kinds of waste and other pollutants into the waters， beyond the self-purification of water bodies and the pollutant carrying capacity， resulting in water and sediment of the physical and chemical properties and biological community composition occurred adverse changes in the inherent destruction of the water ecosystem and water features， thereby reducing the water use value Water pollution caused by many factors: the body of water without proper treatment of urban domestic sewage and industrial waste water; application of chemical fertilizers， pesticides and urban pollutants on the ground， washed by the rain，With the surface runoff into water bodies; with the atmospheric dispersion of toxic substances through gravity settling or precipitation process into the water body and so The first one is the main factor of water The 20th century， 70 years later， with the development of global industrial production and socio-economic prosperity， a large number of industrial wastewater and urban domestic wastewater discharged into water bodies， water pollution is getting These are contaminated water into the plants and animals， human body， causing harm to human pose a major threat to the survival and become human health， economic and social sustainable development， a major obstacle， prevention and treatment of water pollution is that we are nowAre most concerned about the In this paper， mainly the main source of water pollution are introduced， and which sum up the dangers of the existing water pollution treatment technology， methods learned
Water PollutionMy classmates and I had a tour this We had a good But meanwhile I knew that water pollution in our country was becoming more and more On our way， we could see women washing clothes in the Litter was floating on the Waste water produced by a chemical factory was being discharged into the We did not see any fish in the The river was not so clear as Water quality was very I am worried about it because water is important to all living Man can not live without I hope people pay more attention to this problem， especially the Try to control the pollution of water as early as At last I would like to say， "To protect water is to protect "今年春天，我和我的同学去春游，我们玩得都很高兴。但同时，我也了解到我们国家的水污染变得越来越严重了。沿途我们看到许多妇女在河边洗衣，河面上漂着垃圾，一家化工厂正将废水排入河中。河中看不到一条鱼，河水也不像从前那样清澈了，水质很差。对此我深感担忧，因为水对于所有生物都非常重要。没有水人类将无法生存。我希望人们能多关注这个问题，特别是政府部门，争取及早解决水污染问题。最后，我想说“保护水就是保护生命”。说明：以前替别的同学写的，请参考使用。
