Getting clean water from the sea, at a high price

The ongoing severe

drought in California is the just the latest in a recent series

of water crises that have kept large areas of America parched.

Parts of Texas and the Southwest are still recovering from

historic

drought conditions that dried up the region several years ago.

And given global climate change and the world's growing population,

the costly process of desalination -- turning ocean or brackish

water into clean, drinkable fresh water -- is being considered a

viable option in California and elsewhere.

In California alone, 17 desalination plants are either under