The ozone layer - which protects life on Earth from high-energy radiation - has continued to thin over the last three decades, a study has warned. The Montreal Protocol introduced a ban on these long- lasting substances in 1989. Until now, experts have expected that the global ozone layer would completely recover by the middle of the century. "The decline now observed is far less pronounced than before the Montreal Protocol. "But we have to keep an eye on the ozone layer and its function as a UV filter in the heavily populated mid-latitudes and tropics," he said.

Source: dna February 06, 2018 11:42 UTC