Radio Australia: BRONWYN HERBERT: Most refrigerators and air-conditioners rely on hydroflurocarbons for the process of transferring heat. HFCs, as they’re known, were seen as a good alternative to CFCs, which were creating a hole in the ozone layer. But while hydroflurocarbons might help fix one problem, environmental advocates say they have their own destructive potential. MARC CHASSEROT: We were dealing with the ozone depletion issue under Montreal and then weren’t really following what was …