Hartford, Buffalo and Honolulu are the three ‘Greenest’ cities, based on the number of public parks per 100,000 people (177, 138 and, 131 respectively).
Dallas, Concord and Salem are the top 3 'Cleanest’ cities for US runners, based on local and regional air cleanliness data. Carson City, Albany and Cleveland are the worst three cities for air pollution, making them the least desirable for outdoor running and exercise.
Carson City, however, Toledo and Charlotte are the three safest cities for runners, based on government data on local crime rates, while Springfield, Concord and Albany are the most dangerous for outdoor running and exercise. Take a look at the winners and losers of each category below.