SustainLane's US City Rankings report and study on urban sustainability is an in-depth report with interesting indicators and provides insights into ongoing and upcoming city sustainability projects.

"These indicators gauge, for instance, which cities’ public transit, renewable energy, local food, and development approaches are most likely to either limit or intensify the negative economic and environmental impacts of fossil fuel dependence."
The report points out which cities are front-runners, hitting their stride, or trailing.
See The SustainLane 2008 US City Rankings of the 50 most-populous US cities.
# Sustainability
# Sustainable Cities