EIGHT- PENNY NEWS VOLUME 12 • NUMBER 2 NOVEMBER 1993 Manufacturers of the two main types of rigid foam insulation used in the U.S. construction industry have eliminated their use of ozoneeating chlorofluorocarbons (CFCs) ahead of schedule, beating government-mandated deadlines by more than two years. Today, according to Jean Lupinacci of EPA's Global Change Division, all US-made polyisocyanurate and extruded polystyrene foams are CFC-free. That's the good news. The bad news is that the chemicals used to replace CFCs in foam have their own environmental drawbacks. Although the new blowing agents greatly reduce foam's impact on the ozone layer, they still contribute to ozone depletion and global warming — so much so that EPA wants to phase them out over the next few decades. Unfortunately, foam makers haven't been able to identify