Well maybe solar power will be good for something!
Check it out:

One of the drawbacks of desalination is the enormous amount of energy it takes to turn salt water into fresh water. A potential solution has launched in the dry heat of California’s Central Valley, where a pilot project is using solar energy to operate a new kind of desal system.

In San Joaquin Valley’s Panoche water and drainage district, where the experimental solar desalination project is based, the water is brackish—less salty than the ocean, but still too salty to be easily used for agriculture. Plants that can handle brackish water, such as pistachios and wheatgrass, dot the landscape, watered by reclaimed runoff. Salts from the soils accumulate every time the water is reused, and eventually the water becomes too salty to be usable.