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  1. ... will be used. This kinds of pollutants will deplete the ozone layer to cause it to become thinner. More harmful UV rays...

    分類:科學及數學 > 化學 2010年02月20日

  2. ...of water, and what is a contaminant. Oxygen- depleting substances may be natural materials, such...support life on planet Earth. Stratospheric ozone depletion due to air pollution has long been...

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