The ozone layer is on track to recover in the next 40 years, the United Nations says
The ozone layer is a thin shield in the stratosphere that protects humans and the environment from harmful levels of the sun's ultraviolet radiation.
The Earth's ozone layer is on its way to recovering within the next 40 years, thanks to decades of work to get rid of ozone-damaging chemicals, a panel of international experts backed by the United Nations has found.
The ozone layer serves an
