#BIGPICTURE: Ozone-destroying chemical found in the Antarctic
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Aurora Australis lights up the Antarctic, but there's something going on there that has scientists worried. A banned chemical called CFC 11 -- that eats away at Earth's protective ozone layer -- is being made. The problem? No one has a clue who's doing it, or where.
Photograph courtesy of Patrick Cullis, for NOAA via the AP.May 17, 2018