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Halocarbons released as a result of the 2011 Tohoku earthquake include chemicals that deplete the ozone layer and contribute to global warming - including some gases that are no longer used because of those harmful effects on the environment. These include chlorofluorocarbons like CFC-11, a powerful ozone-depleting chemical used in foam insulation until it was phased out in 1996, and hydrochlorofluorocarbons like HCFC-22, an ozone-depleting refrigerant that is also a powerful greenhouse gas and is in the process of being phased out of use. [Source: American Geophysical Union]
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