Chlorine and fluorine containing organic carbon compounds, such as chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are used as refrigerants in cooling appliances, and as blowing agents in heat insulating foams used in buildings and appliances and in heat pumps. CFCs and HCFCs are ozone-depleting substances (ODS), mostly with a very high global warming potential. They have gradually been replaced with hydrofluorocarbons (HFCs) which are not ODS but still significantly contribute to global warming.
Due to the increasing demand for refrigeration and air conditioning (RAC) globally, the stock of appliances, foams and products containing these substances is rising rapidly. It is estimated that the amount of ODS banks will decline, while the HFC banks will increase.
Banks in this context are defined as the “Total Amount of Substances contained in existing equipment, chemical stockpiles, foams and other products not yet released to the atmosphere
(IPCC/TEAP, 2005)
More information about the topic in this video.
If outdated or end-of-life refrigerants, including foams, are not being managed in an environmentally sound manner, they lead to the accumulation of so-called ODS and HFC banks. These emit substances (CFCs, HCFCs, HFCs) that harm and deplete the ozone layer and contribute to global warming. Each year, approximately 1.5 Gt CO2-eq are released from improperly managed or disposed refrigerants. This corresponds to the annual greenhouse gas emissions of 441 coal-fired power plants.
Consequently, the proper disposal of gases and foams in old cooling appliances offers enormous potential for climate action. Despite its significant cost-effectiveness, ODS and HFC banks management remains a "blind spot" in the international climate debate.
To properly manage the waste of ODS and HFC equipment funding, a proper collection infrastructure, training of technicians, information campaigns to raise awareness of the problems associated with ODS/HFC emissions are needed.