We could have a greener economy, even a greener consumer economy by changing the rules - whether it's by taxing carbon or trading carbon, I'm not sure what - but in the end there's just a fundamental problem with the sheer amount we're consuming.

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.

I try very hard to tell stories and not lecture. I try to approach things as an amateur and not an expert, so that when I'm doing something, I'm starting out in a place a lot like where my readers start out - which is to say, naïve.

What an extraordinary achievement for a civilization: to have developed the one diet that reliably makes its people sick!

Ripe vegetables were magic to me. Unharvested, the garden bristled with possibility. I would quicken at the sight of a ripe tomato, sounding its redness from deep amidst the undifferentiated green. To lift a bean plant's hood of heartshaped leaves and discover a clutch of long slender pods handing underneath could make me catch my breath.

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.

Eating is a political act.