But with emissions on the rise, scientists suspect someone is making the chemical in defiance of the ban. There is a small chance that there is a more innocent explanation for the rise in CFC-11 emissions, the scientists say. “If these emissions continue unabated, they have the potential to slow down the recovery of the ozone layer,” Weller said in a statement. That’s a tough group of people.”The ozone layer is slowly recovering, and ozone-depleting substances are still declining. “Knowing how much time and effort and resources have gone into healing the ozone layer and to see this is a shocker, frankly,” Montzka said.

Source: Washington Post May 16, 2018 17:05 UTC