結果 : how do we destroy the ozone layer
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What's Going on with the Hole in the Ozone Layer? We Asked a NASA Expert

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5 Mind-Blowing Facts About the Ozone Layer!

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What happened to the Ozone Hole? | Dhruv Rathee

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How long until the ozone layer is destroyed? | Ask a Scientist

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How CFC's Deplete the Ozone Layer

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How to destroy the Ozone layer with CFC can video

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How OZONE LAYER gets depleted by CFCs

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