"Banned Ozone-Harming Gas, Once on the Rise, Declines Again"

"Emissions of a banned ozone-destroying gas that had risen unexpectedly since 2012 appear to have declined in the last two years, according to preliminary data reported by scientists on Monday.

The findings suggest that China, which was thought to be the source of most of the rogue emissions of the chemical, CFC-11, has made strides in clamping down on illegal production of the gas. CFC-11 is used to make insulating foams.

“The good news is, the report this morning shows emissions now going down significantly,” said Durwood Zaelke, president of the Institute for Governance and Sustainable Development, a research and advocacy organization based in Washington, D.C."

Henry Fountain reports for the New York Times November 4, 2019.