Look, first of all, the climate is changing. I don't think the science is clear what percentage is man-made and what percentage is natural. It's convoluted. And for the people to say the science is decided on, this is just really arrogant, to be honest with you, it's this intellectual arrogance that now you can't even have a conversation about it. The climate is changing, and we need to adapt to that reality.
Barack ObamaAmericans... still believe in an America where anything's possible - they just don't think their leaders do.
Barack ObamaThe genius of our founders is that they designed a system of government that can be changed. And we should take heart, because we’ve changed this country before.
Barack Obama