I think consumerism breeds dissatisfaction, and I think that the advertisers play to that. So I cannot be comfortable with that. On the other hand, the cornucopia of products and innovation - I love Apple, for example. That's a temple of consumerism in many ways.

I'm worried about greenwashing. I think we should come down on it very, very hard, whether it's with criminal intent or actively deceptive.

I became a vegetarian 55 years ago, and I think it's one of the more important behavioral changes I ever took. The more I see of the beef industry and so on, I believe that to be true.

I'm part of the consumer culture. I was part of the baby boom generation. I have a car when I shouldn't, a couple of computers; I can't be anti-consumerist in that sense.

Behavioral change is more important than individual product choices. They both have a role to play.

I think people often underestimate the power of consumers. But I equally say that consumers are like shock troops: You can't keep them agitated and motivated and committed and active forever. There are pulses where they switch on to a particular issue, and just inevitably they switch off.

The path to relative economic, social and ecological sustainability is guaranteed to be littered with failures of every nature and scale. If we recognize them and learn from them, the transition will proceed faster and in more resource-efficient ways. If, on the other hand, we prefer the short-term comfort of burying our failures, or of blaming scapegoats, the transition will be significantly slowed, or could even be derailed completely.