Just halfway through watching "River Cottage", and I'm really worried by the advert in the break.
The manufacturers of Velvet toilet paper are promising to plant three trees to replace every one they turn into loo roll. Sounds very worthy, but what are they going to do when there's nothing but trees? Logically, we'll get to the point where the world consists solely of trees and loo roll. Quite apart from us not having anywhere to live anymore (unless we live in the trees again) - all those trees will suck the CO2 out the atmosphere, and the whole planet could go bang. Nobody ever things of the environmental consequences.