The Earth Is Our Only Home 1

Some people imagine leave this fearful world， only to come down to earth. Scientists tell us that of all the stars known in the vast universe， the earth is the only planet on which human beings can survive. But now we are facing the risky problems concerning our existence on earth.

　　Worldwide environmental deterioration （惡化） is alarming. The earth is plagued with population explosion， energy crisis， lacked of food， housing problem and environmental pollution. During the process of industrialization， human beings are pursuing crazily the benefits from the economic growth. Now we have suffered from the results. The overuse of natural resources has affected ecosystem（生態系統） on earth.

　　These seem to be some of the ways in which our common home is under destruction. The quality of our lives has enormously deteriorated in many aspects. Now our planet is experiencing survival tensions. Only when all of us make consistent efforts can we preserve the environment on earth， because there is no another earth in universe.

　　核心剖析 結尾廻到文章開頭闡明的中心思想或主題句上，使首尾遙相呼應。這樣処理增強了語言表達力度，從而達到再次肯定和強調的傚果。（注意：不要爲結束而單純地重複開始段的話。）