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21

Why is there still a hole in the ozone layer? To some extent, there most likely will always be an area over Antarctica with reduced stratospheric ozone content in late Southern Hemisphere winter. (I wrote "always". Read that as meaning for the next several millions of years.) The issues is how long that annual ozone hole exists, how large that ...


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Some countries are still illegally using banned chlorofluorocarbons (CFCs). "In 2018, high levels of banned chlorofluorocarbons were detected in the atmosphere that were eventually traced to China" Other reasons include climate change. The concentrations of the damaging substances in the atmosphere have leveled off since the protocol came into ...


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