Fresh Water at Zero Energy Cost . How do they do that?

Water at Zero Energy Cost

By 2050, fresh water may be inaccessible to as many as a billion people. Current desalination methods will be using vast amounts of energy to keep up by then, producing no less than 5% of total global greenhouse gas emissions, not to mention untold harm to marine ecosystems from outflow of concentrated brine solution into the open sea. If we could solve those problems then the future would look a bit brighter. And now we can…

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