Chemical Cause of Antarctic Ozone Hole Discovered 20 Years Ago This Month

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Twenty years ago a team of scientists university and government scientists learned the cause of the hole (dark) in the ozone layer over Antarctica to be human production of the chemical chloroflurocarbons or CFCs. The continent is visibile through th ...
Twenty years ago, a team of scientists university and government scientists learned the cause of the hole (dark) in the ozone layer over Antarctica to be human production of the chemical chloroflurocarbons, or CFCs. The continent is visibile through the hole. Credit: NASA

Twenty years ago this month, government and university scientists ventured to Antarctica to study the cause of a hole in the stratospheric ozone layer over the southernmost continent. Those observations were the first definitive demonstration that humans are capable of affecting the entire global climate system and led to the Montreal Protocol, the first treaty to address the Earth's environment.


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