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Ozone
/ˈoʊzoʊn/noun
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Ozone is a molecule made up of three oxygen atoms, forming a bluish gas that's crucial for blocking harmful ultraviolet rays in the Earth's atmosphere. However, in lower levels, it can irritate lungs and contribute to air pollution, making it a double-edged sword in environmental and health contexts.
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The ozone layer's depletion over Antarctica created a hole roughly the size of North America by the 1980s, primarily from human-produced chemicals like CFCs, but international efforts through the Montreal Protocol have led to a 99% phase-out of these substances, allowing slow recovery since 2000.
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