World population set to hit seven billion

The world is about to reach an important milestone – by the end of this month, the global population is expected to hit seven billion.  However, the burgeoning global population puts a great deal of pressure on the planet.

In the years ahead, countries around the world could face some serious challenges in terms of food, energy consumption, and the environment.

Today on American Morning, Christine Romans sits down with economist Jeffrey Sachs, author of The Price of Civilization, to explain what countries are most at risk and to discuss his biggest concerns about the growing population.