Refrigerants: impact on ozone and climate

		Ozone Depletion Potential (ODP)
		The destruction of the ozone layer is caused primarily by the chlorine, fluorine or bromine in compounds, which are capable of splitting ozone molecules (O3) and thus depleting the ozone layer. The Ozone Depletion Potential (ODP) of a compound is expressed as its chlorine equivalent (ODP of a chlorine atom = 1). Ammonia (NH3) 0 Carbon dioxide (CO2) 0 Hydrocarbons (propane C3H8, butane C4H10) 0 Water (H2O) 0 Chlorofluorocarbons (CFC) 1 Hydrochlorofluorocarbons (H-CFC) 0.02–0.06 Fluorocarbons (FCs) 0 Hydrofluorocarbons (HFCs) 0

		Global Warming Potential (GWP)
		The greenhouse effect arises from the ability of substances in Earth's atmosphere to reflect the heat radiated by the Earth back onto our planet. The direct greenhouse potential (GWP) of a compound is expressed as its CO2 equivalent (GWP of a CO2 molecule = 1; 100-year time frame). Ammonia (NH3) 0 Carbon dioxide (CO2) 1 Hydrocarbons (propane C3H8, butane C4H10) 3 Water (H2O) 0 Chlorofluorocarbons (CFC) 4680-10720 Hydrochlorofluorocarbons (H-CFC) 76-12100 Per-fluoro-carbons (PFCs) 5820-12010 Hydrofluorocarbons (HFCs) 122-14310