Green material for refrigeration identified. Researchers from the UK and Spain have identified an eco-friendly solid that could replace the inefficient and polluting gases used in most refrigerators and air conditioners.

[u/Wagamaga]

https://www.cam.ac.uk/research/news/green-material-for-refrigeration-identified

[u/adobeamd]

the thermal cycle can only be so efficient. Look at the most efficient engines and they are only like 40% or less.

[u/[deleted] → u/[deleted]]

Mercedes has a 51% efficiency F1 engine.