BY John Cox - Californian staff writerA U.S. Chamber of Commerce executive knew she was preaching to the choir Tuesday when she told a Bakersfield audience that the country needs to support the broadest possible array of energy sources to meet the challenges of the next quarter century.Praising Kern County's oil and gas leadership alongside local investment in solar and wind technology, the president and CEO of the chamber's Institute for 21st Century Energy, Karen Harbert, said the nation would do well to "copycat (the Bakersfield area) around the country."Read more here.