Threats to ozone layer.

The ozone layer, located in the Earth's stratosphere, plays a critical role in protecting life on Earth by absorbing most of the sun's harmful ultraviolet (UV) radiation. However, this vital shield is under threat due to human activities, primarily the release of chemicals known as ozone-depleting substances (ODS).

The most notorious ODS are chlorofluorocarbons (CFCs), halons, carbon tetrachloride, _______ __________ _________ ___ _____ ______ __________ ________ _________ _________ _______ __________.
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