[rmah]

Vast quantities? LOL, their plant in hawaii does only 128 tons a day. Americans use 3 tons a day. Each. Even relatively thrifty nations use over a 1 ton a day per person.

Hardly "vast quantities". And it's not cheap, they're currently using "reclaimed" solar panels to provide power. At scale, this not possible and not cheap.

More to the point, their main goal is to plant and grow trees, not provide fresh water.