The ozone layer that shields life from cancer-causing solar rays is recovering at a rate of one to three per cent per decade, reversing years of dangerous depletion caused by the release of harmful chemicals, a UN study said on Monday.
The ozone layer that shields life from cancer-causing solar rays is recovering at a rate of one to three per cent per decade, reversing years of dangerous depletion caused by the release of harmful chemicals, a UN study said on Monday.