At the presentations I attended last week, one of the speakers made a comment to the effect of, "everyone wants to go home to their leafy green suburbs."
Needless to say, it really jumped out at me. If everyone wants to go home to their leafy green suburbs, where does that leave cities?
Even if cities are sufficiently leafy green, there's a bigger issue here. It's about individual decision making vs. group decision making. The line of thinking often goes: while it may be fine for me to live in a city instead of a suburb, and deal with some of the resulting inconveniences or grittiness, and bike to work, and only eat (and pay extra for) local, organic food, this isn't really a reasonable thing to expect from other people. In particular, this isn't really a reasonable thing to expect from a potential mate or my offspring.