Students feel the changes in the amounts of greenhouse gases in the global atmosphere. They learn that the amounts of greenhouse gases in the global atmosphere are clearly changing. Some evidence of these changes includes levels of...

Good site for material on the people involved in inventing CFCs and those who discovered its effects on the ozone layer.

[Free Registration/Login Required] Mainly a thematic unit to give teachers a background in CFCs and ozone depletion, this site has a wealth of information for student research.

This site from the Imperial College of Science provides a chemistry based discussion of CFCs with formulas and Molecular structures.

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.