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A comment on Why hasn't commercial air travel gotten any faster since the 1960s? (2009). Parent comment
Chlorofluorocarbons stay 50-150 years in the atmosphere, once they are there it takes a while for things to go back to normal.
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Chlorofluorocarbons stay 50-150 years in the atmosphere, once they are there it takes a while for things to go back to normal.