The loss of ozone over the Arctic this year was so severe that for the first time it could be called an 'ozone hole' like the Antarctic one. The study, published in Nature, is reported on the the BBC's website.
About 20km above the ground 80% of the ozone was lost.
This is the report in ScienceDaily.
About 20km above the ground 80% of the ozone was lost.
This is the report in ScienceDaily.