I’m optimistic, because I think everything is going in that direction.

The biological side, we have products that will dissolve back into nature, like cosmetics or the natural fiber textiles.

Cradle-to-cradle divides products into two spheres, our technical and our biological one. We have to redesign products. On the technical side, we have materials such as metals that can be used forever, like in chairs and washing machines.

When you think about ants and termites, there’s four times as many, but they don’t cause problems because they produce nutrients and no waste.

I think, but not too many. It depends what those nine billion people are doing.