33x20: California's Clean Power Countdown33x20: California's Clean Power Countdown

California has set ambitious goals for a transition to clean, renewable energy: 33% by 2020. Some are skeptical that the goal is within reach. In a special series unfolding over several months, KQED's environmental and science initiatives, Quest and Climate Watch, explore the promise and pitfalls of this historic transformation to "33 by 20."