Whether you believe it a moral imperative or in the rich world's enlightened self-interest, securing the conditions that will lead to a healthy, prosperous future for everyone is a goal I believe we all share.

Two out of every five people on Earth today owe their lives to the higher crop outputs that fertilizer has made possible.

Me and my dad are the biggest promoters of an estate tax in the US. It's not a popular position.

Measles will always show you if someone isn't doing a good job on vaccinations. Kids will start dying of measles.

There is no doubt PC prices will be coming down.

You need to understand things in order to invent beyond them.

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.