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Which of the following statements are correct? a) HCFCs are used as the replacement of CFCs...

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Chemistry

Which of the following statements are correct?


a) HCFCs are used as the replacement of CFCs because they do notreach the Stratosphere.

b) HFCs are used as the replacement of CFCs (and HCFCs) becausedo not contain chlorine and so do not have the ozone depletionpotential associated with the well-established chlorine catalyticcycles.

c) Climate projections indicate that the ozone layer will returnto 1980 levels within the next 20 years.

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