[pj3000]

Chicago, NYC, LA, San Fran, and Seattle could all make the top 10 in non-greenest cities as well, depending on the methodology used. This listing seems to be focused on individual city resident habits, rather than the whole. Many of the cities in the top 10 of this list still produce highly disproportionate amounts of greenhouse gases even when adjusted for their high populations.

There are many different ways to examine which city is the overall "greenest". This EarthLab list is just one, and a non-scientific one at that.