You can't have a rigid view that all new taxes are evil.

Giving money effectively is almost as hard as earning it in the first place.

The most interesting biofuel efforts avoid using land that's expensive and has high opportunity costs. They do this by getting onto other types of land, or taking advantage of byproducts that aren't used in the food chain today, or by intercropping.

So we do software for watches, for phones, for TV sets, for cars. And some of these take a long time to catch on.

Anything that someone's interested in should be very, very easy to call up onto the screen. And in fact the computer over time will see what you're interested in and make that immediately available without your having to be give any commands at all.

The phenomenal generosity of the United States in its aid budget towards health issues is the best in the world. You can look at that broadly, you can look at it in terms of HIV, the PEPFAR money which came together in a Republican administration with bipartisan support.

The billion people who wake up every day trying to figure out if they have enough food to eat won't be at Davos.