The shock of climate change has spurred a worldwide quest to power the entire planet with clean, renewable energy. But is this goal realistic, and if so, how fast can such a dramatic transformation be achieved?
In this sweeping town hall meeting moderated by New York Times environmental reporter Andrew Revkin, pioneering scientists presented research at the vanguard of solar, wind, geothermal and algae/biofuel energy, while conservationists and high-level policy-makers provided additional perspectives on the challenges and opportunities presented by this urgent global problem.