Other
Imperial College: Cf Cs
This site from the Imperial College of Science provides a chemistry based discussion of CFCs with formulas and Molecular structures.
Khan Academy
Khan Academy: Chlorofluorocarbons and the Environment
Read a passage about chlorofluorocarbons and the environment and answer the follow-up questions.
Other
Especial Gas Inc.: Chlorofluorocarbons Cfc's
Especial Gas Inc. provides a good description of what CFCs are and the dates that countries started to ban them. Explains where the name freon came from.