Seawater + desert + solar thermal + greenhouse = food.
This clip calls it Feeding 9 billion. They’re even experimenting with growing crops outside the greenhouse, with cardboard coolers for a local area to produce wheat or other crops. Somehow they’re integrating an algae system as well. It looks bold, and once they’ve worked out the kinks, they’ll commercialise like Sundrop farms (in Adelaide) already have. (Sundrop are building out 4 Hectares right now).