As countries celebrate Ozone Day, and a 32-year ban on ozone-depleting substances, new research has reinforced the belief that the treaty is the world’s biggest ever environmental success.
Global cooperation has meant the ozone layer – the part of the Earth's stratosphere that shields us from the Sun's harmful ultraviolet radiation – is showing consistent signs of recovery from damage caused by manmade chemicals, and is likely to heal completely by 2060.