Meat is a tremendous environmental challenge. It contributes enormous amounts of greenhouse gas, especially beef eating.

It's estimated that about 30 percent of the increase in grain prices could be attributed to the decision to embrace biofuels, particularly corn-based ethanol. It has done nothing for climate change and the business is in real trouble now with the collapse of oil prices. It's completely dependent on a dollar subsidy and tariff from the government.

It's very important to get out, to do reporting. It's also really interesting. I come at it as a journalist, and I think that's helped me, and I come at it as someone who sees nature wherever he looks, and that helps.

In a way, the most morally troubling thing about killing chickens is that after a while it is no longer morally troubling.

But carbon 13 [the carbon from corn] doesn't lie, and researchers who have compared the isotopes in the flesh or hair of Americans to those in the same tissues of Mexicans report that it is now we in the North who are the true people of corn.... Compared to us, Mexicans today consume a far more varied carbon diet: the animals they eat still eat grass (until recently, Mexicans regarded feeding corn to livestock as a sacrilege); much of their protein comes from legumes; and they still sweeten their beverages with cane sugar. So that's us: processed corn, walking.

I get letters from classes all the time. Say it's assigned in someone's 8th grade class, and the teacher asks everyone to write a letter to me about their impressions and what they learned. So, it's incredibly gratifying to hear.

This, for many people, is what's most offensive about hunting—to some, disgusting: that it encourages, or allows, us not only to kill but to take a certain pleasure in killing