Paul Crutzen was a scientist who won the Nobel Prize in Chemistry in 1995 for his study of the damaged ozone layer.Crutzen’s early research helped us understand the makeup of the ozone layer.
He later linked the ongoing thinning of this layer to chlorofluorocarbons, or CFCs, used in aerosol containers, refrigerators, and air conditioners.
Crutzen’s warning against the depletion of the ozone layer helped lead to the 1987 treaty that phased out CFCs, allowing the ozone layer to begin to heal.
Later, Crutzen helped advance the concept of nuclear winter, explaining how the atmosphere would be affected by nuclear war.
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