Re: Water
they also eat thorium - which is the primary waste product of rare earth mining,
So much so that this changes the world's rare earth mines into thorium mines with a rare earth side gig
_VERY_ cheap fuel ($100-200/kg vs $50-75k/kg) and a benefit for other industries
There's enough thorium in old coal power station ash slurry to be wrth mining that too - which would essentially fund cleaning up such sites