From Isla Earth:
Economist Nathan Fiala of the University of California, Irvine has a beef...about beef. Specifically, he's concerned about the impact producing beef has on warming the atmosphere. How much impact? All-told, producing a pound of beef generates the equivalent of 14.8 pounds of carbon dioxide: more than 36 times the amount emitted by producing asparagus… What can be done? Fiala says for one thing, we could all beef up a bit on our understanding. So he's created a "Greenhouse Burgers" web site that features a burger impact calculator.

Audio link available at http://www.islaearth.org/show.php?_a=vs&_sid=1402038000.