In the midst of all our worry about global warming, we seem to have forgotten about the ozone hole. Now there’s good news that shows how the right response CAN make a difference: The ozone hole over Antarctica may close within 50 years, because the level of ozone-depleting CFCs in the atmosphere is declining.
Australian researcher Paul Fraser, who monitors CFCs from the island of Tasmania, says, “The major culprit in the production of the ozone hole is CFCs and they have started to decline in the lower atmosphere. We think the ozone hole will recover by about 2050.” Ozone-depleting gases in the upper atmosphere were at their peak in 2000, but have been declining since then. It takes around 11 years for changes in CFC emissions to be reflected in the ozone layer.