跪求大气及大气污染类论文,各路大虾出出招啊!!!

发布网友发布时间：2022-05-19 06:31

共2个回答

热心网友时间：2023-08-14 09:24

Protection of the Environment Once man did not have to think about the protection of his environment。 There were few people on the earth, and natural resources seemed to be unlimited。 Today things are different。 The world has be。e too crowded。 We are using up our natural resources,and polluting our environment with dangerous chemicals。 If we continue to do this, human life on earth will not survive。 We realize that if too many fish are taken from the sea, there will soon be none left。 Yet,with modern fishing methods, more and more fish are caught。We know that if too many trees are cut down, forests will disappear。 Yet, we continue to use powerful machines to cut down more and more trees。 We see that if rivers are polluted with waste procts, we will die。 Yet, waste procts are still put into rivers。 We know that if the population continues to rise at the present rate, in a few years, there won’t be enough food。What can we do to solve these problems? If we eat more vegetables and less meat, there will be more food available。 Land for crops feeds five times more people than land where animals are kept。 Our natural resources will last longer if we learn to recycie them。 The world population will not rise so quickly if people use modern methods of birth control。 Finally, if we ecate people to think about the problems we shall have a better and cleaner planet in the future。翻译：保护环境过去，人d们不l必担心6保护环境的问题。因为2那时地球上w人v口g稀少4，自然资源似乎取之f不j尽。如今6，一z切7都改变了f。世界变得拥挤异常。我们正在耗尽我们的自然资源，有毒化1学制品的使用也e正污染着环境。如果我们继续这样下n去，地球上a的生命将不i复存在。我们都知道如果从4海里捕捉太q多的鱼，海里就不u会再有鱼了k。但是，现代化1的捕鱼技术使得捕鱼量越来越大w。我们都知道如果砍伐太q多的树木o，森林就会消失。但是，我们仍5旧使用强大j的机械砍伐越来越多的树木a。我们都知道如果河水7被废弃物污染的话，我们只有死路一j条。但是废弃物仍1然源源不t断地进入w河里我们知道，人k口n继续照现在这个f速度增长8的话，不c出几t年，就会发生食物短缺。我们该如何解决这些问题呢? 如果我们多吃蔬菜，少6吃肉类的话，我们就会有更多的食物。因为0同样大z小e的土w地如果种庄稼的话会比1养殖动物多养活五b倍多的人w。如果我们学会再利用的话，自然资源就能持续更久y。如果人x们使用现代化3的生育控制方7法，世界人o口q就不h会增长5如此迅猛。最后，如果我们能够教育人v们都意识到这些问题的话，未来我们就会有一j个j更好、更洁净的星球。v骸z酢q

热心网友时间：2023-08-14 09:24

到知网下啊