This image provided by the San Diego County Water Authority shows an artist rendering of a proposed desalination plant, center right, superimposed over an aerial photograph, in Carlsbad, Calif. The proposed plant will be the Western Hemisphere’s largest desalination plant. (AP Photo/San Diego County Water Authority)

Associated Press
This image provided by the San Diego County Water Authority shows an artist rendering of a proposed desalination plant, center right, superimposed over an aerial photograph, in Carlsbad, Calif.  The proposed plant will be the Western Hemisphere’s largest desalination plant. (AP Photo/San Diego County Water Authority)
This image provided by the San Diego County Water Authority shows an artist rendering of a proposed desalination plant, center right, superimposed over an aerial photograph, in Carlsbad, Calif. The proposed plant will be the Western Hemisphere’s largest desalination plant. (AP Photo/San Diego County Water Authority)
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