Last night, we had Durwood Zaelke on the program. He's one of the world's leading authorities on the efforts to repair the ozone layer. 

He told us that ironically, the world's unprecedented coming together to do something about eliminating CFCs may have repaired the ozone layer, but has actually made global warming worse. 

The next step is to eliminate HFCs, so we can both repair the ozone layer and not contribute to global warming.

Check this web exclusive video to find out more on the law of unintended consequences from Durwood Zaelke.