In this image, from September 2006, the Antarctic ozone hole was equal to the record single-day largest area of 11.4 million square miles (29.5 million square kilometres), reached on Sept. 9, 2000.

It's been 40 years since groundbreaking research announced the discovery of a hole in the ozone layer, a revelation that launched a rapid and successful effort to ban chemicals in hairspray, deodorant ...

Images of the hole in the ozone layer above Antarctica, seen in a series of satellite images over a 21-year time span, from 1980 to 2001. (STR New/Reuters) ...

In rare good news for the planet, the hole in the Earth’s ozone layer is on track to recover completely within decades as harmfule chemicals are phased out, according to a new UN-backed assessment.

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 Nations report says.