[nirolo]

Just created an account to post exactly this. How such a statement could make it into the article is really baffling.

Of the most efficient heatpumps in Europe, most are running on propane, which has negligible GWP ( global warming potential https://hydrocarbons21.com/ipcc-includes-gwps-for-hydrocarbo... ) see for example https://lambda-wp.at/ (only in German, sorry)

Also, air conditioners for the private home can run on propane , see https://www.green-cooling-initiative.org/news-media/news/new...

[stonogo]

And here they've demonstrated an approach which uses a material that is zero GWP, non-toxic, non-hazardous, etc. I get that fridge techs are happy with the way things are, but research continues regardless.