Thirty years after three British scientists discovered a hole in the ozone layer over Antarctica, one of them says humans are still "inflicting major changes on the atmosphere."
"Then, it was chlorofluorocarbons; today it is greenhouse gases," Jon Shanklin of the British Antarctic Survey told The Guardian. "The ozone hole story tells us that it is very easy to cause major changes to the atmosphere — it only took about 10 years to develop — but it is very difficult to restore equilibrium. Unfortunately, we don't seem to have learned that lesson."
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