Ozone problem on course for fix by mid-century: UN

PARIS: In some rare good news for the environment, the UN on Wednesday said Earth's damaged ozone layer was "well on track" for recovery by mid-century, although fixing it over Antarctica would take longer.

In their first review in four years on Earth's vital shield, UN agencies said a 1987 treaty to protect the ozone layer was so successful it was indirectly adding to problems in another area -- global warming.