[3] seems like a bit of a stretch to me. we know for a fact that different communities have different energy needs for moving water around based on simple geogr

[3] seems like a bit of a stretch to me. we know for a fact that different communities have different energy needs for moving water around based on simple geography. we also know that different communities have different electricity sources providing municipal power. (the bay area's primary water system makes use of hydroelectric power, for example). finally, i'm not convinced that the marginal cost per gallon makes up the total cost of moving water around. much of the costs are fixed infrastructure costs that don't necessarily move with utilization. here's a thought experiment: assume infinite clean electricity and desalination capacity in the face of an overcarbonated atmosphere and climate change. do you install and irrigate as much vegetation as you can or do you rip it all out and put in rocks?