I think in this case he's including the suburbs in urban, as contrasted with rural living. In that light urbanization is generally harmful, as rural living tends to have less of an effect on wildlife since individuals are rarely stopping foxes, deer, etc from crossing through their property in the same way that miles of sprawl and deforested lawns do.

Farms destroy the natural environment as well, not many farms are in forests and you generally shoot things that might attack your sheep or cattle.

I am not trying to make an argument here. It is a very complicated problem without an easy solution, I only wanted to arise this topic.