"They are slowly destroying the protective ozone layer in the stratosphere which protects us from ultraviolet radiation," Ulland said. Tech. Sgt. Walter Wright, of Duluth, ran in a marathon with ...

Ozone layer depletion, is simply the wearing out (reduction) of the amount of ozone in the stratosphere. Depletion begins when CFC’s get into the stratosphere. Ultra violet radiation from the ...

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