A delicious, warm pizza, just ordered from the pizza place around the corner and delivered to the office within 30 minutes. The product, delivered in what appears to be an ecologically sound recyclable cardboard box, eases our guilty conscience as regards our carbon footprint. Our mouths water until we ask ourselves where the box has actually come from and whether the pizza actually absorbs the heavy metals from the box like a sponge. Heavy metal pizza instead of salami pizza? Professor Braungart, chemist and forefather of Greenpeace’s chemistry department,...