In 80% of the world, energy will be bought where it is economic. You have to help the rest of the world get energy at a reasonable price.

President [George] Bush made the U.S. absolutely the leader, between its own PEPFAR, and it's been by far the biggest Global Fund donor. That's a legacy.

We believe unbelievable progress can be made, in both inventing new vaccines and making sure they get out to all the children who need them.

If you're using first-class land for biofuels, then you're competing with the growing of food. And so you're actually spiking food prices by moving energy production into agriculture.

I can understand wanting to have millions of dollars; there's a certain freedom, meaningful freedom, that comes with that.

We all have the chance to create a world where extreme poverty is the exception rather than the rule.

People who feel the world is tilted against them will spawn the kind of hatred that is very dangerous for all of us. I think it's a healthy sign that there are demonstrators in the streets. They are raising the question of 'is the rich world giving back enough?'