"Readers Digest" studies America's Cleanist Cities
"Reader's Digest compared data on our 50 most populous metropolitan areas to come up with a ranking of America's cleanest cities."
The top five are: #5 San Francisco; #4 Columbus, Ohio; #3 Buffalo, New York; #2 San Jose, California; and #1 Portland, Oregon.
The study says that it is because of California's strict air-quality regulations that two California cities are in the top five.
Rankings of the 50 Cleanist (and Dirtiest) Cities are here
To read more, about the study, go here.