The United States finally acted upon concerns over the ozone layer when in 1978 it banned the production of CFCs in aerosol products.
 
    In 1987 the international community followed suit by organizing the Montreal conference that resulted in the Montreal Protocol on Substances that Deplete the Ozone Layer.  The main thrust of the conference centered upon limitation of production and usage of CFCs.  They originally established as their goal a 50% reduction of CFC production wordwide by the year 2000.  It was then revised to require the phaseout of CFC production by 1996.  If you are interested in more details about this conference, please the follow the above link to get the actual document that they produced.

    In 1990, the United States passed the Clean Air Amendment Act.  The purpose of this legislation was to ban the use and production of CFCs by January 1st, 1996, and to ban the use and production of HCFCs by the year 2030.

    Finally, the United States began requiring, as of May 15, 1993, the printing of warning labels stating that "this product contains ozone-depleting substances".