Well, I’m not having kids, have never owned an internal combustion engine, have a plant-based diet, don’t fly, etc etc. and I go to every demonstration I can, write to people — I live in the Netherlands so this actually has some effect. So I’m not sure what else I can realistically do.

But at some point we have to be realistic — all my cutting down is worthless compared to someone like John Travolta, who does family holidays in his own private 747.