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保护我们的共同之家 — 地球,是我们的职责 PowerPoint PPT Presentation


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环保. 保护我们的共同之家 — 地球,是我们的职责. 自从地球出现人类以后,人类便在有限的地球上无限地发展着。特别是在现代文明到来之际,出现了人口爆炸; 地球上每年有六百万公顷的土地沙漠化,每年有 一千一百万公顷森林消失; 在未来的二十至三十年间,地球的生物将有百分之二十五面临生死抉择; 全球每年有四千五百亿吨工业废水和生活污水倒入江河,全球百分之二十五的渔场遭到破坏; 二十亿人生活在污染物超标的大气环境里, 其中一点二五亿人是在十分污浊的空气中受着煎熬; 全球垃圾产生量已超一百亿吨 …… 除此之 外,还有气候变暖、臭氧层遭破坏、酸雨等全球性突出的环境问题。. 地球危机.

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保护我们的共同之家 — 地球,是我们的职责

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6431529


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Help me!!!


6431529


6431529

  • 19981123.735

  • 123777384


Let s do it

Lets do it!


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The end

Thank you!


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