There's a lot of research that suggests that organic yields are close or superior to conventional yields depending on factors like climate. In a drought year an organic field of corn will yield more - considerably more - than a conventional field; organic fields hold moisture better so they don't need as much water. It simply isn't true that organic yields are lower than conventional yields.

Corn is a greedy crop, as farmers will tell you.

In Joel's view, that reformation begins with people going o the trouble and expense of buying directly from farmers they know - "relationship marketing," as he calls it. He believes the only meaningful guarantee of integrity is when buyers and sellers can look one another in the eye, something few of us ever take the trouble to do. "Don't you find it odd that people will put more work into choosing their mechanic or house contractor than they will into choosing the person who grows their food?"

The best farming systems are ones where animals and plants are put into a synergistic relationship.

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.

Food is also about pleasure, about community, about family and spirituality, about our relationship to the natural world, and about expressing our identity. As long as humans have been taking meals together, eating has been as much about culture as it has been about biology.

For though we may be the Earth's gardeners, we are also its weeds. And we won't get anywhere until we come to terms with this crucial ambiguity about our role - that we are at once the problem and the only possible solution to the problem.