One surprise is how deeply the food system is implicated in climate change. I don't think that has really been on people's radar until very recently. 25 to 33 percent of climate change gases can be traced to the food system. I was also surprised that those diseases that we take for granted as what will kill us - heart disease, cancer, diabetes - were virtually unknown 150 years ago, before we began eating this way.

We are what we eat, it is often said, but of course that's only part of the story. We are what what we eat eats too.

Eat mostly plants, especially leaves.

When chickens get to live like chickens, they'll taste like chickens, too.

Why don't we pay more attention to who our farmers are? We would never be as careless choosing an auto mechanic or babysitter as we are about who grows our food.

Students are very engaged by the issues, and it's not surprising because food choices are one of the few powers a child has.

The issue of snacking is complicated. In principle, "grazing" is probably a good idea. It would even out the insulin spikes and things like that from eating large meals. The problem is it makes it harder for people to control the amount they're eating.