Up until now, we have actively chosen not to own or drive a care for environmental, not financial, reasons. Even when DD1 was born, we made sure we could sustain our decision to rely on public transport, walking or riding. So it does so happen that people make (what might be seen to others to be extreme) decisions to maintain a more environmentally concepts lifestyle. Unfortunately, once we found ourselves about to become a 2 children family (which wasn't our plan, plan was DD1 in school, TTC #2 and still not own a car, still live urban etc) we needed to make the decision to move further out so we could afford a big enough home. We're now not within walking distance of everything, with loads of quick and easy transport options. We're quite isolated compared to what we were, so I went and got my L's, because living here with two kids and no real way of getting around is a recipe for disaster. So I can see how people make environmental lifestyle choices. But I'm just not sure if population control is the answer