We're always projecting our moral categories on things. I think that's inevitable. But capitalism places no particular value on morality. Morality in the market is enforced by contract and regulation and law, because morality is understood to be in conflict with the motive force of greed and accumulation.

I think using waste oils as fuel makes sense. We do waste a huge amount of vegetable oil in this country and using that as a fuel source strikes me as fine.

People who snack sometimes sometimes eat kind of thoughtlessly and end up eating a lot more. But in principle, it's a really good idea if you can exert the kind of discipline needed.

It's very important to get out, to do reporting. It's also really interesting. I come at it as a journalist, and I think that's helped me, and I come at it as someone who sees nature wherever he looks, and that helps.

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.

My work has also motivated me to put a lot of time into seeking out good food and to spend more money on it.

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.