Don't eat any foods you've ever seen advertised on television.

Oil companies have gas stations. There's this whole huge structure that is about finding a new liquid for the tank. And the idea that maybe there shouldn't be a liquid, that maybe the best is an electrical grid, a sustainably powered electrical grid that we all plug into, that doesn't sit well with oil companies.

One of the problems is that the US government supports unhealthy food and does very little to support healthy food. I mean, we subsidize high fructose corn syrup. We subsidize hydrogenated corn oil. We do not subsidize organic food. We subsidize four crops that are the building blocks of fast food. And you also have to work on access. We have food deserts in our cities. We know that the distance you live from a supplier of fresh produce is one of the best predictors of your health.

Food is not just fuel. Food is about family, food is about community, food is about identity. And we nourish all those things when we eat well.

Not that I'm against meat eating. But I think we're eating too much.

Okinawa, one of the longest-lived and healthiest populations in the world, practice a principle they call hara hachi bu: Eat until you are 80 percent full.

The whole problem of industrial agriculture is putting all of your eggs in one basket. We need to diversify our food chains as well as our fields so that when some of them fail, we can still eat.