Comment by goda90

Supercritical CO2 turbines: https://energy.wisc.edu/industry/technology-highlights/super...

On a much smaller scale I've been hoping for a small solar powered CO2 compressor to exist so I could use it for mosquito traps. The state of the art for those right now is burning propane for the CO2 combined with a scent emitter for the human smell to attract female mosquitos.