At the height of the 1973 energy crisis, Arthur Rosenfeld had a revelation. Disturbed about having to spend half an hour in line at a gas station one Friday night, the particle physicist calculated that keeping his floor of offices brightly lit all weekend as usual would consume the equivalent of 5 gallons of gasoline. So Rosenfeld took what then seemed like a bold step: He turned off the lights. For 30 years, Rosenfeld has been one of the forces guiding California on a mission of conservation. And today the state uses less energy per capita than any other state in the country, defying the international image of American energy gluttony. Since 1974, California has held its per capita energy consumption essentially constant, while energy use per person for the United States overall has jumped 50 percent. California has managed that feat through a mixture of mandates, regulations and high prices. The state has been able to cut greenhouse gas emissions, keep utility companies happy and maintain economic growth. And in the wake of the Intergovernmental Panel on Climate Change report on global warming, California serves as a model for other states seeking a similar path to […]