Offshore windmills hold clean-energy promise David R. Baker, Chronicle Staff Writer Someday decades from now, California's sprawling coastal cities could draw their power from floating windmills that bob on the sea like buoys, far from shore. Their blades would spin over deep ocean water, turning in winds that are steadier and stronger than they are on land. Undersea cables would send their electricity to shore. This kind of floating windmill has not yet been deployed en … [Read more...]