Here is a speech by Obama given to the Global Climate Summit conference that was held in november 2008. I just came across it and found it comforting that we finally have a president that understands the importance of combating climate change.
It is also interesting to see the reaction of the gathering to this speech, which was delivered by video: Obama gets a standing ovation as though he were in the room.
“Now is the time to confront this challenge once and for all. Delay is no longer an option. Denial is no longer an acceptable response. The stakes are too high. The consequences, too serious. Stopping climate change won’t be easy. It won’t happen overnight. But I promise you this: When I am President, any governor who’s willing to promote clean energy will have a partner in the White House. Any company that’s willing to invest in clean energy will have an ally in Washington. And any nation that’s willing to join the cause of combating climate change will have an ally in the United States of America. Thank you.” - Transcript