Kern County supervisors have approved plans to build a corn-powered ethanol plant north of Bakersfield. The project from Cilion Inc., approved Tuesday night, is slated to generate as many as 55 million gallons of the fuel additive each year. Environmental justice advocates rallied against the project, saying it would pump out nitrous oxide emissions that would worsen air quality in the polluted San Joaquin Valley. Planners say the project's value to the community trumps the environmental concerns. Two weeks ago, Hanford city leaders approved another ethanol plant to be based in Kings County, but agreed to pay a $1 million...