I follow @ Yishan on twitter, former CEO of reddit.  He seems rather bullish on desalination and built a solar powered desalination plant on the Big Island

https://twitter.com/yishan/status/1778751568416059792

Here's his thread on the potential of solar-powered reverse-osmosis desalination:

https://twitter.com/yishan/status/1669620099911946240

food_and_drinks

The Grab - are food and water the next things we'll fight wars over?

k00b

I've read not long ago here on SN that desalination has become surprisingly cheap and technically feasible. So maybe water will become a solved problem too, much like energy? Although I'm not sure how much energy is a solved problem, truth be said.