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The world we live in is becoming more and more intolerable because of environmental destruction. Bird flu and Sars are two typical examples that environmental destruction may threaten our life. Besides, forest destruction , water and air pollution result in decrease of planting land and unpleasant weather. Serious as the problem seems, we can come up with some measures to deal with it. First of all, the authorities should adopt the policy of sustainable development, and laws concerning environmental protection should be put into effect and enforced strictly just as our government has been doing. What s more, every citizen should realize the seriousness of the problem and make concerted efforts to protect our environment. In addition, planting trees helps improve and beautify the environment.（约120字） | 
