Earlier this week, Grist's Dave Roberts moderate a climate change panel with Hillary Clinton, John Edwards, and Dennis Kucinich. I'm pretty sure that makes Dave the World's Most Important Man. His full write-up of the event is here, and worth the read. That said, I could use more specifics. Dave says, "Clinton was by far the most responsive to specific questions. She argued in some detail for why she is uniquely able to accomplish something on this issue." What, exactly, is her argument on that score?