[ They do cut trees down where d'Artagnan's from - but of course, he is from a world before machines, and they simply don't have the capacity to do it on an industrial scale. He can't imagine that. ]

There's far less forest here than there is in my world. I've noticed that. I live in the city there, in Paris, but it's tiny compared to the cities here. And it's not so far from nature.

This world has expanded to fit its population. You're saying they went too far?