Could we cure climate change? Geoengineering researcher Tim Kruger wants to try. He shares one promising possibility: using natural gas to generate electricity in a way that takes carbon dioxide out of the air. Learn more -- both the potential and the risks -- about this controversial field that seeks creative, deliberate and large-scale intervention to stop the already catastrophic consequences of our warming planet.

We're building an artificial intelligence-powered dystopia, one click at a time, says techno-sociologist Zeynep Tufecki. In an eye-opening talk, she details how the same algorithms companies like Facebook, Google and Amazon use to get you to click on ads are also used to organize your access to political and social information. And the machines aren't even the real threat. What we need to understand is how the powerful might use AI to control us -- and what we can do in response.

Fifty years of armed conflict in Colombia has left the countryside riddled with land mines that maim and kill innocent people who happen across them. To help keep communities safe from harm, TED Resident Carlos Bautista is developing an app to track land mines -- and direct travelers away from them. Learn more about how this potentially life-saving tool could promote peace in countries plagued by land mines once conflicts end.

Are diverse companies really more innovative? Rocío Lorenzo and her team surveyed 171 companies to find out -- and the answer was a clear yes. In a talk that will help you build a better, more robust company, Lorenzo dives into the data and explains how your company can start producing fresher, more creative ideas by treating diversity as a competitive advantage.