Many problems than just blaming air travel.
1) Not enough recycling bins on public UK streets. Toronto every bin is for a different purpose. One for bottles, one for paper, one for genral waste.
2) Too many parents driving kids 200 yards to school in landrovers.
3) Pointless journeys made by people in cars, myself sometimes.
4) Not enough been done like solar powered houses etc, and even if theyre is theyre too expensive.