Ozone layer is heal­ing

Down to Earth - - THE FORTNIGHT -

THE OZONE hole over the Arc­tic is fi­nally be­gin­ning to close up, ac­cord­ing to ob­ser­va­tions by NASA sci­en­tists. The agency's AURA satel­lite, a mis­sion to study ozone and air qual­ity, shows a long term trend that, bar­ring un­fore­seen hic­cups, should see the hole over the Arc­tic shrink to less than 13 mil­lion square km within the next 30 years. At the mo­ment the hole is about 19 mil­lion square km, so that rep­re­sents a rapid rate of re­pair. A new re­search by Leeds Univer­sity says the suc­cess of the 1987 Mon­treal treaty is the main rea­son for the clos­ing up of the ozone hole.


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