What is one property desirable in a refrigerant regarding environmental impact?

A desirable property of a refrigerant regarding environmental impact is low greenhouse gas emissions. Refrigerants can contribute to climate change if they have high global warming potential (GWP), and those with low greenhouse gas emissions help mitigate this effect. By choosing refrigerants that minimize their contribution to greenhouse gas emissions, we can work toward reducing the overall environmental footprint of cooling systems.

In contrast, options such as high ozone-depleting potential are undesirable since they can harm the ozone layer, which protects the Earth from harmful ultraviolet radiation. Low energy consumption, while beneficial for efficiency, does not directly address the environmental impact of the refrigerant itself. Finally, high flammability poses safety hazards and is not a characteristic that contributes positively to environmental considerations. Thus, low greenhouse gas emissions stands out as the key property in promoting environmental sustainability within the context of refrigerants.