> ...requires veery high concentrations of CO2 (energy needed to concentrate it)... I wish we had a process similar in efficiency to a heat pump that moves gra

> ...requires veery high concentrations of CO2 (energy needed to concentrate it)... I wish we had a process similar in efficiency to a heat pump that moves gradients of diffuse molecules than thermal energy. But the osmotic pressure or other diffuse gradient movement methods I'm aware of are quite energy intensive.