Nature World News: More than 20 years after the Montreal Protocol introduced limits to the emission of ozone-depleting substances, the hole in the ozone layer has yet to heal.
This was the conclusion brought forth by NASA scientists in two new studies Wednesday at the annual meeting of the American Geophysical Union in San Francisco.
According to the researchers, a deeper look at the inner workings of the hole that forms each year over Antarctica revealed that while the hole has stopped growing in size, it has...