Why is ozone depletion worse over Antarctica? © Getty Images

Why is ozone depletion worse over Antarctica?

The hole in the Antarctic ozone layer is of great concern to environmentalists.

Asked by: Sheila Taylor, Oxfordshire

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Ozone depletion occurs when ozone molecules in the upper atmosphere are destroyed by chemical reactions with halogen gases, such as chlorine. Cold conditions above Antarctica in the winter months encourage the formation of extremely cold, high-altitude clouds.


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