The Ozone Layer and Hole

The video explains that over 90% of Earth's ozone is in the stratosphere, forming a protective layer that absorbs harmful UVB rays. In the 1980s, scientists discovered significant ozone depletion over Antarctica and the Arctic, linked to chlorofluorocarbons (CFCs). These stable industrial chemicals release chlorine when exposed to UV light, which then breaks down ozone. The Montreal Protocol was established to phase out CFCs, aiming for ozone recovery by 2050.

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