Q. Dear Umbra,

I’m a full-time environmental activist living on an anti-aviation protest camp. When I first came here, I was shocked by the number of environmentalists who smoke tobacco. Given that it’s grown in the Americas, probably on poorly managed land with chemical fertilizers and pesticides, and shipped across to the UK only to eventually go up in smoke, I’ve always had a suspicion that tobacco has a fairly large environmental footprint. Can you confirm or deny this?

Ru R.
Sipson, UK