From shrinking sea ice to deadly air pollution, it seems there's never a shortage of bad news about the environment. But now comes some very good news — in the form of satellite data showing that the worrisome ozone hole in the atmosphere over Antarctica is slowly healing. The data, from NASA's Earth-orbiting Aura satellite, indicate that depletion of the protective ozone layer over Antarctica was about 20 percent lower during the 2016 Antarctic winter (early July to mid-September) than during the same period in 2005.
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