Curiously, the one bodily fluid of other people that doesn't disgust us is the one produced by the human alone: tears. Consider the sole type of used tissue you'd be willing to share.

People have traditionally turned to ritual to help them frame and acknowledge and ultimately even find joy in just such a paradox of being human - in the fact that so much of what we desire for our happiness and need for our survival comes at a heavy cost.

Corn is the hero of its own story, and though we humans played a crucial supporting role in its rise to world domination, it would be wrong to suggest we have been calling the shots, or acting always in our own best interests. Indeed, there is every reason to believe that corn has succeeded in domesticating us.

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

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.

There are fundamental tensions between the biological reality of the planet and the economic reality. To some extent you can adapt the economy, create a new set of rules and incentives to send it down a better track, but finally people in the first world are going to have to consume a whole lot less.

Every major food company now has an organic division. There's more capital going into organic agriculture than ever before.