The world today has 6.8 billion people...that's headed up to about 9 billion. If we do a really great job on vaccines, health care, reproductive health services, we could lower that by perhaps 10 to 15 percent.

If you really could take the CO2, when you burn hydrocarbons - coal, for example - if you could really capture the carbon and sequester it - they call it CCS - if the extra capital cost, energy cost, and storage costs over time didn't make it super expensive, then that's another path that you could go down.

Over time, yes, countries will need to look at specific GMO products like they look at drugs today, where they don't approve them all. They look hard at the safety and the testing. And they make sure that the benefits far outweigh any of the downsides.

The AIDS is a disease that is hard to talk about.

I can understand wanting to have a million dollars but once you get beyond that, I have to tell you, it's the same hamburger.

I like to read general biology - things about the immune system and advances in that area - because it lays the foundation for my part of the dialogue at the foundation about what things we ought to pursue.

Steve Jobs' ability to focus in on a few things that count, get people who get user interface right, and market things as revolutionary are amazing things.