Binding emissions targets for the developing nations are out of the question.

Every generation faces a challenge. In the 1930s, it was the creation of Social Security. In the 1960s, it was putting a man on the moon. In the 1980s, it was ending the Cold War. Our generation's challenge will be addressing global climate change while sustaining a growing global economy

How we [Americans] move [on climate] will determine the international direction. To lead, we must act.