World's Population Teeters on the Edge of 7 Billion: Now What?

In partnership with the Pulitzer Center and National Geographic, the PBS NewsHour explores how the composition of our society is changing as the world population reaches 7 billion. Hari Sreenivasan discusses the population milestone with the U.N. Population Fund's Azza Karam and National Geographic magazine's Dennis Dimick. The program also features reports from Pulitzer grantees Steve Sapienza and Fred de Sam Lazaro.