"I think more and more people are beginning to realize that food is the new oil in the sense that there's a real struggle now to control sources of food and food supplies," says Lester Brown. "The exporting countries are obviously in a strong position now." Joel Carillet /iStockphoto.com hide caption

"Can something be called chicken or pork if it was born in a flask and produced in a vat?" asks Michael Spector. "Questions like that have rarely been asked and have never been answered." iStockphoto.com hide caption