Current refrigerants (e.g., R-410) have large global warming potentials (GWP) when they inevitably leak into the atmosphere, so there's a move to other chemical

Current refrigerants (e.g., R-410) have large global warming potentials (GWP) when they inevitably leak into the atmosphere, so there's a move to other chemicals. On of the leading contenders (at least in the commercial/industrial space) is actually CO2 (R-744): * https://www.hpacmag.com/features/co2-as-a-refrigerant-yesco2/ https://www.hpacmag.com/features/co2-as-a-refrigerant-yesco2... * https://www.ohio.edu/mechanical/thermo/Applied/Chapt.7_11/Chapter9.html https://www.ohio.edu/mechanical/thermo/Applied/Chapt.7_11/Ch... * https://blog.isa.org/why-co2-is-the-most-promising-refrigerant-in-the-cooling-industry https://blog.isa.org/why-co2-is-the-most-promising-refrigera... * https://plumbingandhvac.ca/co2-refrigeration/ https://plumbingandhvac.ca/co2-refrigeration/ * https://en.wikipedia.org/wiki/Carbon_dioxide#Refrigerant https://en.wikipedia.org/wiki/Carbon_dioxide#Refrigerant CO2 has GWP=1, and just about everything else is higher.