The End of Food?

In 2004, author Paul Roberts came out with his book "The End of Oil," and we've all seen oil's path since then.

Now Roberts is out with a kind of follow-up: "The End of Food." It could make a person want to hoard tuna.

Not that oil or food are literally vanishing anytime soon. But Roberts argues that when it comes to cheap, abundant food supplies — to supermarket shelves piled high with affordable, attractive groceries — we've been living in a golden age. And that age is about to end.

This hour, On Point: The end of food as we've known it.Guests:

Paul Roberts, author of "The End of Food," and a contributor to Harper's, The Washington Post, and the Los Angeles Times, he gained international acclaim for his 2004 book, "The End of Oil."

Keith Agoda, founder and president of Sky Vegetables, an organization of "urban farming enthusiasts." The company builds and runs commercial and sustainable greenhouses on the rooftops of supermarkets in the United States.