[summer_steven]

Cities compromise 3.5% of the United States land area. They are not taking land away from trees or wildlife..

[sliverstorm]

I don't think he's concerned so much about wildlife, I think the point is just that some cities don't really have anything in particular going for them, aren't worth rebuilding, and should be abandoned like a Western ghost town.

[vacri]

When you take out the great plains, the desert scrublands, and the alaskan wilderness, that 3.5% grows.