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Global Warming Seen Lifting California Sea Level a Foot

Global warming may push sea levels as much as a foot higher in California in the next two decades, threatening airports, freeways, ports and houses, according to a report examining risks along the U.S. West Coast.

Increases are forecast to be greatest south of Cape Mendocino, with levels rising 1.5 inches to 12 inches (4 to 30 centimeters) by 2030 and as much as two feet by 2050, according to a report today by the National Research Council. In Oregon and Washington, increases may be more modest, because land also is rising. A major quake in the active seismic zone would change the forecast.