The depletion of stratospheric ozone is a serious global environmental problem. Ozone depletion can result in an increase in skin cancer, cataracts, and possible immune system impairments among humans as well as a reduction in crop yields and diminished productivity of oceans. The discovery of the ozone hole over Antarctica has led to a number of international treaties, including the Vienna Convention, the Montreal Protocol and the London Amendment. To implement these protocols, EPA has issued regulations for phasing out production and importation of chloroflurocarbons (CFCs). The Agency has also worked with international organizations to implement new labeling regulations and programs to recycle ozone-depleting substances found in air conditioners and refrigerants.
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