People are going to buy cheap fertilizer so they can grow enough crops to feed themselves, which will be increasingly difficult with climate change.

By helping us to be more productive, technology lets us to spend less time focusing on survival, and more on solving other challenges.

Playing Bridge is a pretty old fashioned thing in a way that I really like. I was watching my daughter ride horses this weekend and that is also a bit old fashioned but fun. I do the dishes every night - other people volunteer but I like the way I do it.

When AIDS emergency broke out and was killing millions in Africa, the Global Fund was created so that a level of generosity would show up and buy the medicines to save those lives.

Microsoft Research has a thing called the Sense Cam that, as you walk around, it's taking photos all the time. And the software will filter and find the ones that are interesting without having to think, 'Let's get out the camera and get that shot.' You just have that, and software helps you pick what you want.

I think given all the different imperatives - getting energy to Africa, security of energy, climate change, that we should be spending half as much as we spend on health, which will get you all the way up to $15 billion - the health people don't like it when things get compared to their number.

American dependence on oil has only gone up as we've gone through various crises and not invested in R&D.