Imagine a world without the fear of a climate disaster. Meet the innovators working to make a zero-carbon future possible. | Bill Gates

Bill and Melinda Gates say they often get the question: "What's the point of saving all these children if it leads to over-population?" Here's Bill Gates' answer. http://cnn.it/2GbrrR2 | CNN

Microsoft founder Bill Gates talks to CNN's Anderson Cooper about why he believes he's on the spectrum and how he now sees it as his "superpower." | CNN