Xinhua: The hole in the earth's stratospheric ozone layer over Antarctica is closing slowly and should be completely recovered in the later half of this century, but its effect on global climate change is still uncertain, a New Zealand expert said Thursday.
The Montreal Protocol, which effectively banned chlorofluorocarbons (CFCs), had helped reduce the size of the ozone hole, University of Canterbury academic Dr Adrian McDonald said in a statement.
The protocol, which entered into force in 1989, is...