professor of the university of colorado at boulder. tad, was the president overstating the problem? is the planet in danger if we don't develop a clean energy agenda? >> the president is not overstating. it's very clear things are happening fast in the arctic, faster than we expected them to happen and these things that are our don't stay in the ork tick. they spread over the globe. it's a critical part of the entire planet's climate system. >> so he was there supporting the clean energy agenda yet, tad, there are new approvals for oil drilling off the alaska osteoporosis. is the president sending a contradictory message? how real are these concerns over energy exploration in the arctic? >> well, it's an action that goes in the opposite direction but it's the compromise i think