Friday, 800 scientists from around the world stood up and told us that humans are the driving force behind dangerous climate change and that the impacts will be pervasive and severe. They did it in the form of the most robust and authoritative report on climate change to date, released this morning in Sweden. As Josh Laughren, WWF's director of climate and energy, wrote yesterday -- this is a message that all of us need to take seriously. The threat is clear, the timing urgent. We have everything it takes to lead. It is in our own best interests, and the world's, to act now.