Each city was ranked by its sustainability practices, which include: quality of air and drinking water, roadway congestion, local food availability and park space.

The top 10 most sustainable cities are:

1. Portland, OR

2. San Francisco, CA

3. Seattle, WA

4. Chicago, IL

5. New York, NY

6. Boston, MA

7. Minneapolis, MN

8. Philadelphia, PA

9. Oakland, CA

10. Baltimore, MD

And coming in last is… Mesa, Arizona.

The air quality in the desert is apparently pretty bad.

Portland has always been at the top of many “green” lists, so we hope that other cities will try to go greener to give Portland a run for its popularity!