Producing drinking water from seawater has been
technologically achievable for several decades. Until recently, however,
application of seawater desalination ("desal") on a large scale has
been primarily limited to arid regions of the world that have a cheap supply of
energy, such as in the Middle East. Desalination plants can take water from the
ocean or drill down and grab the less salty, brackish water from seaside
aquifers. It is a worldwide phenomenon that has been embraced in thirsty California,
with its cycles of drought and growing population. But many projects have been
stymied by skyrocketing costs and legal challenges.
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