Before anyone knew that CFCs were harmful to the ozone layer, they were used regularly in many products.
 Where were CFCs found? Move your cursor over the can to find out.
In 1987, many nations from around the world got together and signed a treaty to limit the use of CFCs. In the United States, CFCs have been banned since 1996. Companies no longer use them when they make new products. Scientists are still hard at work trying to answer many complicated questions about the ozone layer and its thinning.
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