Austin Texas, arguably America's Greenest City, posts all resources, ratings and other useful info on this site. An easy way to get a little taste of how they maintain their reputation as the Greenest City.
The one thing all 6 reasons have in common is the lack of commitment on the part of the people, individually or as organizations, to long term solutions. The human element is what's holding us back.
The Passive house concept is starting to catch on in the States, but has been growing in popularity in Europe for over a decade. The goal is "super efficiancy" in new and retrofit construction.