Fertile Ground USA...Celebrating the people behind the plow

While interviewing Dickson Despommier, creator of the Vertical Farm Project, on the Colbert Report, Stephen Colbert muses why we should build vertical farms when we can plow our way to the Arctic Circle.

Hear why we are at the end of our cheap food chain and what will happen next. Paul Roberts talks to Tom Ashbrook on WBUR's ON POINT.