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  • 演講稿——當地球上只剩下最后一滴水時

    時間:2018-02-08 07:21:11來源:<推薦訪問:環保演講稿
    水,是人類的生命之源,它像人的血液一樣必不可少。它無色無味,但卻又無處不在。
      我們每個人都離不開水,水能維持一個人正常生活,人們每天需要5千克水,我們人體內水的含量達90%以上,每天吃飯食物都是通過水來消化、吸收的。自然界中如果沒有了水,土地會龜裂,河水會斷流,草木會枯黃,人畜會死亡。人類有了水才會得以生存,所以才有水是生命的源泉這種說法。
      長期以來,人們普遍認為水是“取之不盡,用之不竭”的,不知道愛惜,而浪費揮霍。當知道我國水資源人均量并在豐富,地區分布不均勻,年內變化莫測,年際差別很大,再加上污染,使水資源更加緊缺,自來水其實來之不易。
      我們人類擁有的水很多嗎?看看下面這組數據吧。地球表面的70%被水覆蓋,但淡水資源僅占所有水資源的2.5%,近70%的淡水固定在南極和格陵蘭的冰層中,其余多為土壤水分或深層地下水,不能被人類利用。地球上只有不到1%的淡水或約0.007%的水可為人類直接利用,而中國人均淡水資源只占世界人均淡水資源的四分之一!
      即使我們擁有的水資源如此之少和珍貴,但我們還沒有認真地對待它。全球性的水污染,水資源的過度消耗和管理不當已經造成可利用水資源水量和水質的大幅下降。現在,世界上每天有6000人因為得不到水或足夠清潔的水而死亡。如果這種趨勢不能得到有效控制,20年后,世界人口的2/3將面臨無水可用的危境!
      我想長期以來,大多數人都會有節約用水的理念。可為什么都缺少具體的行動?隨意污染和大手大腳的現象怎么還那么普遍呢!環境的污染和破壞,治理起來得費很大力氣,我們或許沒又什么能力,也可能沒有什么機會去做,但是我們可以用自己的實際行動來做到節約用水,這是最簡單易行的不是嗎?保護環境,我們可以從自己身邊做起,從小事做起。不是為了別人,而是為了我們自己,為了這地球上最后一滴水不是我們的眼淚,請大家行動起來,節約用水,人人有責。  

     

     
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