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SAO PAULO, BRAZIL - 2015/02/02: Sao Paulo cityscape showing air pollution and skyline of the city during sunset, Brazil. (Photo by Ricardo Beliel/Brazil Photos/LightRocket via Getty Images)

With climate change causing chaos across the world, and the US Environmental Protection Agency’s never-ending parade of public malfeasance, it’s probably been some time since the public considered the ozone layer. After all, virtually every country stopped producing ozone-depleting coolants by 2010. How could the ozone still be shrinking?

According to a study produced by scientists at the National Oceanic and Atmospheric Administration, production of trichlorofluoromethane (CFC-11) has increased. CFCs were once widely used in the manufacture of aerosol sprays, as blowing agents for foams and packing materials, as solvents, and as refrigerants. Older appliances and products may still contain CFCs, but worldwide production of these chemicals halted in 2010.

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