When you have the medical advances you think will they be available to everyone. Will they not just be for the rich world or even just the rich people and the rich world? Will they be for the world at large?

When you want to do your homework, fill out your tax return, or see all the choices for a trip you want to take, you need a full-size screen.

Exposure from a young age to the realities of the world is a super-big thing.

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.

Well-spent aid money is saving lives for a few thousand dollars per life saved.

People in business understand paying money to be more efficient. You can bootstrap markets where the devices are too expensive at first because these are so valuable to some people.

Our work in global health is about things like cutting childhood deaths, and every year we continue to make progress there.