How is ozone layer being depleted

By the release of chemical compounds containing gaseous chlorine or bromine from industries and other human activities, which breaks down ozone molecules, reducing Ozone's ultraviolet radiations absorbing capacity

Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.  CFCs and halons cause chemical reactions that break down ozone molecules, reducing Ozone's ultraviolet radiation-absorbing capacity.

Explanation:

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