One alternative to reverse osmosis is new technique called shock electrodialysis: https://www.sciencealert.com/scientists-have-figured-out-how-to-shock-the-salt

One alternative to reverse osmosis is new technique called shock electrodialysis: https://www.sciencealert.com/scientists-have-figured-out-how-to-shock-the-salt-out-of-seawater https://www.sciencealert.com/scientists-have-figured-out-how...