Talking to mothers, always brings it home because they're so anxious to do everything they can for their kids and so tragic for them.

We paired this announcement of the R&D [commitment] with the so-called Breakthrough Energy Coalition, which is 27 [major investors] saying, "Hey, we'll put significant money into [energy innovations] when they're ready to spin out probably into startup companies."

At Microsoft there are lots of brilliant ideas but the image is that they all come from the top - I'm afraid that's not quite right.

Teaching is the human thing, in terms of building the kids' self-confidence, so if we take the broad ways that we want to see society to be better, science can only provide certain pieces of that.

I regret being the richest man in the world because that position attracts undeserved publicity.

Well, it's taken time to get this going, but he was right. If you give people a chance to associate themselves with a cause they care about, while buying a great product, they will. That was how the RED Campaign was born, here in Davos.

The malaria parasite has been killing children and sapping the strength of whole populations for tens of thousands of years. It is impossible to calculate the harm malaria has done to the world.