which freon was banned due to ozone layer
Phasing Out R-22 Freon. As part of the Montreal Protocol the Environmental Protection Agency has begun a Phase Out program which will lead to a U.S. ban on all ozone depleting substances. The targeted ozone depleting substances include all HCFC freon refrigerants; commonly referred to as HCFC-22 (R-22), and HCFC-142.