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What are the causes of the ozone layer depletion?
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The primary cause of the ozone layer depletion is chlorofluorocarbons (CFCs), which are used in a wide range of products, including refrigerants, aerosol propellants, and fire extinguishers. These chemicals were found to be destroying the ozone layer by the 1980s. In 1987, the Montreal Protocol was signed, banning CFC production. As a result, the ozone layer has begun to recover.