Something Squirrelly this Way Comes

I've read that we should worry less about an energy crisis and more about the pending clean water crisis. Ultimately, we can find other fuel sources, but it's impossible to live without water. Of course, the two are wrapped up in each other—you need water to create electricity, and you need energy to pump water into a lot of places.

It's possible that desert resorts like Las Vegas will eventually disappear unless new water sources or energy systems are found. There's no way the surrounding environment can support that population and infrastructure, and the amount of water and energy spent in that city is insane. Whatever will those CSI people do?