Do know what CFC's replaced - ammonia? Ammonia was used in refrigeration before CFC's were invented and when your fridge developed a leak you were gassed to dea

Do know what CFC's replaced - ammonia? Ammonia was used in refrigeration before CFC's were invented and when your fridge developed a leak you were gassed to death. Nobody foresaw what CFC's would do to the ozone layer. It took science to find this. I have never seen a claim from science that something is safe. At best you get a claim that something appears to have minimal risks. Minimal != Zero