[与自然环境有关的论文]1. 水利可持续发展的必要性 水是人类赖以生存的无可替代的宝贵资源，是社会经济发展的物质基础。经济发展和人类的生活离不开水的供给和保障。水利包含着水资源开发利用、除害...+阅读
Nature, the environment which human beings live by, is magnificent and unique. There si only one earth with super living conditions in the universe. We should have cherished nature and preserved it. Conversely, however, we have been continually spoiling it, even to a shocking degree. Now let's see what we have dong. Thousands of trees have been cut down per year, which has caused soil erosion. Hundreds of thousands of tons of CFCS have been left in the higher sky in the last decade which has led to the ozone layer leak above the South Pole that covers an area of that of the United States. Million tons of fuel containing nitrogen and sulphur have been consumed per year, which has eventually resulted in acid rain throughout the world
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