Human health should now be thought of as a collective property of the human-associate d microbiota, as one group of researchers recently concluded in a landmark review article on microbial ecology - that is, as a function of the community, not the individual.

You want to say the thing that will drive everybody in the direction you want to go. But as a writer you have a pact with your readers that you'll be really straight with them at all times.

Fairness forces you - even when you're writing a piece highly critical of, say, genetically modified food, as I have done - to make sure you represent the other side as extensively and as accurately as you possibly can.

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.

The wonderful thing about food is you get three votes a day. Every one of them has the potential to change the world.

Another thing cooking is, or can be, is a way to honor the things we're eating, the animals and plants and fungi that have been sacrificed to gratify our needs and desires, as well as the places and the people that produced them. Cooks have their ways of saying grace too... Cooking something thoughtfully is a way to celebrate both that species and our relation to it.

Anyway, in my writing I've always been interested in finding places to stand, and I've found it very useful to have a direct experience of what I'm writing about.