The most obvious depletion of the ozone layer has occurred over

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The depletion of the ozone layer is most severe over Antarctica, where a large hole in the ozone layer develops every year during the spring season. This is due to the stratospheric circulation patterns and the presence of human-made chemicals known as chlorofluorocarbons (CFCs) that destroy ozone molecules. Other regions, such as the Arctic, also experience some ozone depletion, but it is not as severe as over Antarctica.

The Most Obvious Depletion of the Ozone Layer Has Occurred