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 (惡化) 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(生態系統) on earth.
Environmental deterioration has critically upset the balance of nature. The damage mainly attributes to man's ignorance, greed and wastefulness. For immediate interests human beings have overused earth resources with no thought for the future. Now the terrible damage poses a severe challenge to our existenceg Then what will our future be if we do not act now Ⅱ
核心剖析 用反問、以提出問題供讀者考慮的結尾方式，間接闡述了作者的觀點。在經過前面的鋪墊、說明之後，這個結尾方法可行可取，毫無強加于人之感。雖然形式是問句，但是意義卻是強語勢的肯定，具有明顯的強調作用。以反問結束全文，往往發人深省、令人回味、引起讀者思考。