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NASA finds unexpectedly high levels of banned ozone-depleting chemical

22
Aug
2014

Its been decades since the world realized the danger that chlorofluorocarbons (CFCs, formerly found in products like aerosol sprays, refrigerants, and solvents) posed to the Earths ozone layer. We are not supposed to be seeing this at all, said NASAs Qing Liang, lead author of the study. It is now apparent there are either unidentified industrial leakages, large emissions from contaminated sites, or unknown CCl4 sources. Between 2007 and 2012, studies showed now new CCl4 emissions — but this new study shows that worldwide emissions of CCl4 were still at 30 percent of their peak levels back before ban went into effect.

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