Future generations may well have occasion to ask themselves, "What were our parents thinking? Why didn't they wake up when they had a chance?" We have to hear that question from them, now.

And nobody is talking about taking guns away from hunters or sportsmen or banning all guns. Nobody is talking about that.

It is just human nature to take time to connect the dots, I know that. But I also know that there can be a day of reckoning when you wish you had connected the dots more quickly.

The insistence on complete certainty about the full details of global warming-the most serious threat we have ever faced-is actually an effort to avoid facing the awful, uncomfortable truth: that we must act boldly, decisively, comprehensively, and quickly, even before we know every last detail about the crisis. Those who continue to argue that the appropriate response is merely additional research are simply seeking to camouflage timidity or protect their vested interest in the status quo.

When energy prices go up, the difficulty of projecting demand also goes up - uncertainty goes up.

A lot of people go straight from denial to despair without pausing in the middle and doing something about it.

We can't negotiate the facts. We can't negotiate the truth about the situation. And for those who are too fearful to finish, it can be done and must be done. Make sure we succeed, . . . It is wrong for this generation to destroy the habitability of our planet and ruin the prospects of every future generation.