An image of Earth from outer space
Media playback is unsupported on your device
Video

Ozone layer 'shows signs of recovery', say scientists

The Earth's protective ozone layer is starting to repair itself, according to a panel of United Nations scientists.

The main reason behind its recovery, they say, is the fact that certain chemicals, such as those used in aerosol cans, were phased out in the 1980s.

Roger Harrabin reports.

Go to next video: London's clue to stubborn ozone levels