Society: Controversial environmental author Paul Ehrlich talks biofuels, offshore drilling, peak oil

Forty years ago, author Paul Ehrlich stirred up controversy by predicting that the world's steady population growth would cause hundreds of millions of people to starve within a decade of publication of "The Population Bomb." Though his predictions were wrong, he is often credited with having had a major influence on the environmental movement in the '60s and '70s. During today's OnPoint, Paul Ehrlich, author of the new book "The Dominant Animal" and Bing professor of population studies and professor of biological sciences at Stanford University, gives his take on today's top energy and environment issues. He also responds to critics who have accused him of using scare tactics.