California is both the nation's leading renewable-energy proponent and one of the few states to actually put its power where its mouth is. In November, the California Energy Commission released its annual Renewable Portfolio Standard (RPS) report which found that the state's three investor-owned utilities -- Pacific Gas & Electric, Southern California Edison and San Diego Gas & Electric -- are on track to collectively offer 50 percent of their electricity from renewable resources by 2020. That's a full decade faster than anyone had anticipated.
Reports like these have been used to promote clean-energy production throughout the US and the rest of the world since the 1970s. However, it wasn't until 2002 that California codified the practice. But despite being in effect for only 15 years, California's mandatory reporting has become a potent tool in fighting greenhouse-gas emissions throughout the state.
