A steady decline in the levels of ozone-harming CFC chemicals in the atmosphere has resumed, scientists say.
This follows a recent, dangerous pause in that downward trajectory, which could have slowed the healing of Earth's protective ozone layer.
Atmospheric measurements published in 2018 pointed to illegal CFC production that was occurring in Eastern China.
Stopping that production appears to have set the ozone layer's healing process back on track.
The ozone layer is a thin part of the Earth's atmosphere that absorbs most of the ultraviolet radiation from the Sun.
When it is depleted, more of this UV radiation can reach the surface - causing potential harm to humans and other living things.
Ultraviolet rays can damage DNA and cause sunburn, increasing the long-term risk of problems such as skin cancer.
CFCs stand for chlorofluorocarbons. This family of chemicals has seen widespread use in refrigeration and as propellants in aerosol cans. Their role in destroying the ozone layer has been known since the 1980s. ...bbc
No comments:
Post a Comment
Only News