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(C) Chlorofluorocarbons $(CFCs)$ are synthetic compounds used in refrigerators,air conditioners,and aerosol sprays.When $CFCs$ reach the upper atmosph

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Chlorofluorocarbon

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(C) Chlorofluorocarbons $(CFCs)$ are synthetic compounds used in refrigerators,air conditioners,and aerosol sprays.When $CFCs$ reach the upper atmosphere,they are broken down by ultraviolet radiation,releasing chlorine atoms.These chlorine atoms act as catalysts in the destruction of ozone $(O_3)$ molecules.It is estimated that $CFCs$ are responsible for approximately $80\%$ of the total depletion of the ozone layer.

The most important compound which accounts for almost $80\%$ of the total depletion of the ozone layer is $.........$

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