Calif. may drink from ocean by 2011 The California Coastal Commission approved a plan Wednesday to build the Western Hemisphere's largest desalination plant - a move aimed at relieving water shortages in the nation's most populated state. The decision came after a daylong debate over the merits of the $300 million Carlsbad project, which is expected to eventually produce 10 percent of San Diego County's water supply from ocean water. Construction on the plant could begin next year and begin delivering drinking water in 2011, according to Connecticut-based Poseidon Resources Corp., which is heading the project. Commissioners gave the plant conditional approval in November. However, final approval hinged on the commission endorsing the company's plans to make the plant carbon-neutral and to restore wetlands to make up for the marine life that would get drawn in and killed through the plant's intake system....