Cities are 2% of the earth's crust, but they are 50% of the world's population.

Some trash is recycled, some is thrown away, some ends up where it shouldn't end up.

Phone networks can capture life on our planet.

The deployment of geolocating tags attached to ordinary garbage could paint a surprising picture of the waste management system, as trash is shipped throughout the country in a maze-like disposal process - as we saw in Seattle with our own Trash Track project.

As medical research continues and technology enables new breakthroughs, there will be a day when malaria and most all major deadly diseases are eradicated on Earth.

A molecular manufacturing technology will let us build molecular surgical tools, and those tools will, for the first time, let us directly address the problems at the very root level.

Media and technology are our greatest assets. And yet, they are our most undervalued and underused assets. Now when I say that, people look at me like I'm crazy because every young person we know in the world is never without media, ever.

When you have to do as much as women do, the Internet allows you to - from home - figure out a way to extend your reach and power in the world. It allows you to do what job you've done traditionally, and create aspirations by carrying on a job and using the Internet to amplify everything you're doing.