Technology

Because entrenched, and exceptionally wealthy interests. Reading about how about in CA there are tons of Colorado River fed foreign owned farms growing alfalfa to export to the middle east is the definition of capitalist success...the profit of a commodity has been made the most efficient; acquired cheaply for something otherwise impossible with international arbitrage as the medium.

Every time someone asks people in the southwest to take shorter showers show them this: https://www.foodandwaterwatch.org/2022/02/24/california-water/

And Samsung and TSMC and others

The "one more lane" of water supply.

Well they're part of a larger grid. Any clean energy on the grid will be cheaper than dirty, so will be sold to offset dirty even if Arizona was 100% clean.

You only need a certain amount of power. (In fact, you can't generate more power than is needed, or you cause massive issues.) If this adds extra energy generation but doesn't add demand, generation somewhere else will be taken offline. This will be whatever is cheapest, and green energy is nearly free after construction, so it'll be dirty energy that isn't running anymore.

Thanks for the recommendation, I'll check it out!

anyone that's interested:

the water knife

I just finished reading that. Agree with all of that