Where are new ozone-destroying emissions coming from?

Scientists don't know, yet.

Thirty years after countries agreed to ease up on the use of chemicals damaging the ozone layer, there are promising signs that the ozone will be fully recovered by the 2060s. But we’re not out of the woods yet. A study published this month in Nature Geoscience shows that emissions from dangerous gases banned in the 1980s are actually on the rise today—with implications not only for the ozone layer but for climate change as well. Even more worryingly, we’re not sure what, exactly, is causing some of these emissions to creep up...

The research done by Western and his team isn’t able to concretely pin emissions to a specific region or factory—but we can make some guesses. China has, historically, been the world’s largest producer of HFCs. As InsideClimate News reported, outside of China, the largest producer of the HFCs whose byproducts were tracked by the study is a Honeywell factory located in Louisiana. - Earther