For the first time in 30 years, the gaping hole in the ozone layer above Antarctica is showing signs of healing.
Every year since it was discovered in 1985, scientists have watched the hole grow bigger from one Antarctic spring to the next, eventually covering 10.9 million square miles in 2015.
Now researchers are noting an encouraging trend. Though the hole still exists and reached a record size last year, it is forming at a slower rate, according to a report published Thursday in the journal Science.
Thanks to human actions to curb the use of...