What two variables are used to measure a refrigerant's impact on the environment?

The two variables used to measure a refrigerant's impact on the environment are global warming potential (GWP) and ozone depletion potential (ODP).

Global warming potential assesses how much a refrigerant contributes to climate change in comparison to carbon dioxide over a specific timeframe, typically 100 years. A refrigerant with a high GWP indicates that it has a significant impact on global warming relative to CO2.

Ozone depletion potential evaluates a chemical's ability to deplete the ozone layer. This is particularly important since the ozone layer protects the Earth from harmful ultraviolet radiation. Refrigerants that release chlorine or bromine into the atmosphere can significantly contribute to ozone layer degradation, resulting in increased UV exposure, which can lead to health and environmental issues.

These two metrics are critical for understanding the environmental effects of refrigerants, guiding the selection of more eco-friendly options in line with regulations and sustainability practices.