As Richard Alley was saying

You have now had a discussion or a debate here between people who are giving you the blue one and people giving you the green one. This is certainly not both sides. If you want both sides, we would have to have somebody in here screaming a conniption fit on the red end, because you are hearing a very optimistic side

Evidently someone in Washington was listening to the guy on the red end.  Rolling Stone has an interview with President Obama, in which the subject of climate change came up.  Eli has bolded two key parts of the answer

James Hansen, NASA's leading climate scientist, has said this about the Keystone pipeline: that if the pipeline goes through and we burn tar sands in Canada, it's "game over" for the planet. What's your reaction to that statement?

James Hansen is a scientist who has done an enormous amount not only to understand climate change, but also to help publicize the issue. I have the utmost respect for scientists. But it's important to understand that Canada is going to be moving forward with tar sands, regardless of what we do. That's their national policy, they're pursuing it. With respect to Keystone, my goal has been to have an honest process, and I have adamantly objected to Congress trying to circumvent a process that was well-established not just under Democratic administrations, but also under Republican administrations.

The reason that Keystone got so much attention is not because that particular pipeline is a make-or-break issue for climate change, but because those who have looked at the science of climate change are scared and concerned about a general lack of sufficient movement to deal with the problem. Frankly, I'm deeply concerned that internationally, we have not made as much progress as we need to make. Within the constraints of this Congress, we've tried to do a whole range of things, administratively, that are making a difference – doubling fuel-efficiency standards on cars is going to take a whole lot of carbon out of our atmosphere. We're going to continue to push on energy efficiency, and renewable energy standards, and the promotion of green energy. But there is no doubt that we have a lot more work to do.

Part of the challenge over these past three years has been that people's number-one priority is finding a job and paying the mortgage and dealing with high gas prices. In that environment, it's been easy for the other side to pour millions of dollars into a campaign to debunk climate-change science. I suspect that over the next six months, this is going to be a debate that will become part of the campaign, and I will be very clear in voicing my belief that we're going to have to take further steps to deal with climate change in a serious way. That there's a way to do it that is entirely compatible with strong economic growth and job creation – that taking steps, for example, to retrofit buildings all across America with existing technologies will reduce our power usage by 15 or 20 percent. That's an achievable goal, and we should be getting started now.