On: Japan has opened its first osmotic power plant

[fragmede]

Yeah it's like regenerative braking vs losing that energy as waste heat.

[jalk → fragmede]

Great analogy. This is similar to producing gas from sewage to feed back into the gas network, which is used to cook food, which produces sewage. (i.e. https://www.hofor.dk/english/hofor-utilities/town-gas/)