Cool thanks. One interesting thing I noticed as a midwest town dweller, is that while my zip code rates quite low in population density (up there with houston)

Cool thanks. One interesting thing I noticed as a midwest town dweller, is that while my zip code rates quite low in population density (up there with houston) it's actually in the green as far as carbon goes. It seems that this is true of many of the smallish towns in the midwest (population < 500k). In general suburbs of large cities use vastly more carbon than towns with the same population density, not really that surprising. I guess the question then is it easier to have more small towns or to have high density cities without surrounding sprawl.