The Phase-Out of R-22. Here we go again…

In 1987 most of the world (190 countries) ratified the Montreal Protocol to reduce the use of ozone depleting refrigerants, not only in air-conditioning and refrigeration, but also in aerosol spray cans (like hair spray and spray paint).  At that time, the most commonly used refrigerant was R-12 a chlorofluorocarbon (CFC).  CFC's were the most aggressive [...]