The Earth Is Our Only Home
   Some people imagine to 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 (恶化) is alarming. The earth is plagued with population explosion, energy crisis, lack 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(生态系统) on earth.
   Every one of us should support precautionary (预防性的) approaches to environmental challenges. If we all take care of the earth, it will still be a Garden of Eden(伊甸园). Where there are environmentalists (环保人士), there is hope. When we undertake (采取) initiatives (初步行动) to promote greater environmental responsibility, we could gain the magic power of Captain Earth(地球超人）.
核心剖析  样文1引用了“伊甸园”的典故。样文2引用了动画片《地球超人》中的典故。用格言、谚语或习语等富有哲理性的语言总结全文，既言简意赅又有更强的说服力。此种结尾方法往往给人以语言平淡而情感强烈的印象，使人读来顿生感悟，给人以启迪和思考。