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Recovery of ozone layer expected to take at least 40 years

This year marks the 25th anniversary of the Montreal Protocol on Substances that Deplete the Ozone Layer, which was signed on Sept. 16, 1987. It has succeeded in cutting the production and consumption of ozone-destroying chemicals, which have a long atmospheric lifetime and it will take several decades before their concentrations are back to pre-1980 … Continue reading Recovery of ozone layer expected to take at least 40 years

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