Which type of refrigerant is noted for low environmental impact?

The selected answer highlights that HFOs (hydrofluoroolefins) and natural refrigerants are known for their low environmental impact. This is primarily because these refrigerants are designed to have a much lower global warming potential (GWP) compared to traditional refrigerants like CFCs and HCFCs.

HFOs are synthesized to break down more quickly in the atmosphere, reducing their long-term impact on climate change. Natural refrigerants, such as ammonia, carbon dioxide, and hydrocarbons, also have very low or zero GWP and do not contribute to ozone depletion, making them environmentally friendly alternatives.

On the contrary, HCFCs and CFCs are synthetic compounds that contribute significantly to ozone depletion and have high GWP. Perfluorocarbons, while low in ozone depletion, have extremely high GWP, making them less desirable from an environmental perspective. Therefore, HFOs and natural refrigerants stand out as the most sustainable options within the refrigerant landscape.