The struggle to save the global environment is in one way much more difficult than the struggle to vanquish Hitler, for this time the war is with ourselves. We are the enemy, just as we have only ourselves as allies.

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.

We all know the leopard can't change his stripes.

The dominance of short-term perspectives has led to routine decisions in the markets that sacrifice the long-term buildup of genuine value in pursuit of artificial, short-term gains.

Our way of life is at stake, our grandchildren are at stake, the future of civilization is at stake.

I strongly believe in the separation of church and state. But freedom of religion does not mean freedom from religion, there is a better way.

The struggle against poverty in the world and the challenge of cutting wealthy country emissions all has a single, very simple solution... Here it is: Put a price on carbon.