The case for optimism
We've known about global warming for 50 years and done little about it, says Google.org director Larry Brilliant. In spite of this and other depressing trends, he's optimistic and tells us why. From Skoll World Forum, Oxford, UK, www.skollfoundation.org
In 2006, the epidemiologist wished for a global system that would detect diseases as soon as they emerge. See the impact of this idea.