Bangladesh is largely a river delta, and the rising sea level means that when storms come in, the human sanitation is backing up, the ability to farm.

The huge turnout for Live 8 here and around the world proves that thanks to the leadership from people like Tony Blair and Gordon Brown the world is beginning to demand more action on global health and poverty.

Eventually we'll be able to sequence the human genome and replicate how nature did intelligence in a carbon-based system.

I think when smallpox was eliminated, the whole world got pretty excited about that because it’s just such a dramatic success.

I have this very positive view of the world getting better and better. The list of things that could be huge setbacks is not very long: A nuclear war, climate change and epidemics.

When I was in my 40s, Microsoft was my primary activity.

Nuclear energy, in terms of an overall safety record, is better than other energy.