Weather 'behind ozone hole changes'

[Still Waters]

New insight has been gained into the recovery of the ozone layer.

Scientists have been puzzled why the hole, which forms each year over Antarctica, has been changing considerably in size from year to year.

Now Nasa researchers say it is the weather that is primarily driving this variability - not the ozone-destroying chemicals in the upper atmosphere.

http://www.bbc.co.uk...onment-25344563