
The TED Radio Hour: The Big Five Dian Lofton/Getty/iStock hide caption
The TED Radio Hour: The Big Five
Dian Lofton/Getty/iStockThe TED Radio Hour: The Big Five Dian Lofton/Getty/iStock hide caption
The TED Radio Hour: The Big Five
Dian Lofton/Getty/iStockWhat are the five biggest global challenges we face right now--and what can we do about them? This hour, TED speakers explore some radical solutions to these enduring problems.