It's relevant inasmuch as the transport and purification of water can have a substantial energy cost (and things like _groundwater_ are being depleted faster th

It's relevant inasmuch as the transport and purification of water can have a substantial energy cost (and things like _groundwater_ are being depleted faster than used - some of California is sinking, and the Ogalalla (while huge and still mostly there) would take 6,000 years to replenish if depleted https://en.wikipedia.org/wiki/Ogallala_Aquifer https://en.wikipedia.org/wiki/Ogallala_Aquifer