保护环境_专业英文ppt.pptVIP

* * What does our earth look like? How is our living environment? how breathtaking the natural beauty is, however, today our Earth is suffering from an unprecedented disaster: worse and worse air condition, water pollution, solid waste , ozone hole, acid rain ,global warming, soil erosion, land desertification……Deteriorating living environment seriously threat to human’s health and life. is becoming a severe problem , which mainly caused by transport action and factories production. The air pollution destroy the conditions that we depend on. Air pollution  Water pollution is the contamination of water bodies such as lakes, rivers, oceans, and groundwater. All water pollution affects organisms and plants that live in these bodies of water and in almost all cases the effect is damaging either to individual species and populations but also to the natural biological communities. It occurs when pollutants are discharged directly or indirectly into water bodies without adequate treatment to remove harmful constituents. In China, wastewater treatment technology is relatively backward, large number of intractable industrial wastewater discharge even they can’t meet the national standards. What’s more , some factory discharge waste water directly to the water body because the cost of treatment is too high. Everybody knows waste paper and used coke cans are discarded everywhere. You might have seen plastic bags flying in the sky and getting caught in the trees when the wind blows or maybe you have seen old cans floating in the rivers and polluting the water. Our environment is the place in which we live, but it is being ruined by us. Solid waste pollution The global warming Increasing global temperature will cause sea levels to rise and will change the amount and pattern of precipitation, including an expanse of the subtropical desert regions. Other likely effects include increases in