What is the highest possible ozone depletion potential (ODP) among CFC, HCFC, HFC, or HFO refrigerants?

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Multiple Choice

What is the highest possible ozone depletion potential (ODP) among CFC, HCFC, HFC, or HFO refrigerants?

Explanation:
ODP reflects how much a refrigerant can deplete the ozone layer, relative to a reference with an ODP of 1.0. Chlorine- and bromine-containing compounds are what drive ozone destruction in the stratosphere. CFCs release chlorine when they break down, and this chlorine sustains ozone loss, giving them the highest ODP among these groups. HCFCs also have chlorine but are less persistent and thus have a lower ODP. HFCs and HFOs do not contain chlorine or bromine (HFCs have only fluorine, and HFOs are hydrofluoro compounds), so they have essentially zero ODP. Therefore, the highest possible ODP among these refrigerants is 1.0.

ODP reflects how much a refrigerant can deplete the ozone layer, relative to a reference with an ODP of 1.0. Chlorine- and bromine-containing compounds are what drive ozone destruction in the stratosphere. CFCs release chlorine when they break down, and this chlorine sustains ozone loss, giving them the highest ODP among these groups. HCFCs also have chlorine but are less persistent and thus have a lower ODP. HFCs and HFOs do not contain chlorine or bromine (HFCs have only fluorine, and HFOs are hydrofluoro compounds), so they have essentially zero ODP. Therefore, the highest possible ODP among these refrigerants is 1.0.

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