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Earth’s protective ozone layer is slowly but noticeably healing at a pace that would fully mend the hole over Antarctica in about 43 years, a new United

Earths ozone layer is healing. Ozone levels between the polar regions reach pre-1980 levels by 2040 and the assessment found the hole over Antarctica will close by 2066.

There are signs of progress more than 35 years after every nation in the world agreed to stop producing chemicals that harm the ozone layer.

The report shows that progress is slow, and won't go back to pre-1980 levels until at least 2040.

The report shows that progress is slow, and won't go back to pre-1980 levels until at least 2040.

The report shows that progress is slow, and won't go back to pre-1980 levels until at least 2040.

A United Nations scientific report says Earth's protective ozone layer is slowly but noticeably healing. Scientists say the hole over Antarctica should be fully mended in about 43 years.

The report shows that progress is slow, and won't go back to pre-1980 levels until at least 2040.

The report shows that progress is slow, and won't go back to pre-1980 levels until at least 2040.

DENVER (AP) -- Earths protective ozone layer is slowly but noticeably healing at a pace that would fully mend the hole over Antarctica in about 43 years, a new United