Editorial: Some of California's most stunning natural wonders are on the brink of oblivion

It is time to imagine a California bereft of its most wondrous natural assets, from the giant sequoia to the coast redwoods to the Sacramento-San Joaquin River Delta - the largest and most ecologically diverse estuary on the west coast of both American continents - to the migrating salmon whose journey begins in the Sierra and runs down the great Central Valley rivers to the Pacific in seasonal pulses of rainfall