People say they don't have time to cook, yet in the last few years we have found an extra two hours a day for the internet.

Pay more, eat less. Diversify your diet and eat wild foods when you can.

Wrangham cites several studies indicating that in fact humans don't do well on raw food: they can't maintain their body weight, and half of the women on a raw-food regimen stop menstruating. Devotees of raw food rely heavily on juicers and blenders, because otherwise they would have to spend as much time chewing as the chimps do. It is difficult, if not impossible, to extract sufficient energy from unprocessed plant matter to power a body with such a big, hungry brain.

There are certain products that it's worth buying organic just because the alternatives have so much pesticide. There's a list of the dirty dozen that you can get off the Web. Strawberries, potatoes. A handful of crops that have very high pesticide residues if you don't buy organic. If you eat that a lot, that's a good place to invest.

The garden suggests there might be a place where we can meet nature halfway.

This for many people is what is 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. It's not as though the rest of us don't countenance the killing of tens of millions of animals every year. Yet for some reason we feel more comfortable with the mechanical killing practiced, out of view and without emotion by industrial agriculture.

Now that I know how supermarket meat is made, I regard eating it as a somewhat risky proposition. I know how those animals live and what's on their hides when they go to slaughter, so I don't buy industrial meat.