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From the speech of彭, we know that end of the world will not come.But if really have the end of the world，I mean if，who should be the killer?Certainly the human.Look at these pictures,Environmental problems are becoming more and more serious all over the world.In our country, ten bigenvironmental problems can be attributed to Atmospheric pollution, Water pollution, Garbage disposal, Land desertification, Water lo and soil erosion, Droughts and floods, Biodiversity damage, WTO and environmental problems, environmental problems in Three gorges reservoir area,and Persistent organic pollution.Of all the causes, the primary causeis human activities.Although the social have been aware of the seriousne of this problem, and make the action, the situation is still bad.We often hearthatsomewhere appear extreme weather or somewhere appeared land subsidence or some others, As if environmental problems didn't get greatly improved.Just think, if this situation continues,maybe oneday We do not have resources to use or Because of the greenhouse effect, the earth covered with
oceans,or something else.All in all,if we don’t want to see the end of the world, All of us should try to improve the environment.
