I moved to Cincinnati from suburban Indiana in 2009. For the last 3 years I have ridden my bike for transportation since I didn't have a car. I've noticed that after just a 3 mile ride to downtown my legs are blackened, and the more I ride, the stickier and darker they become. The air feels hot and laden with particles and does not smell fresh. When I go back home, I feel much more comfortable breathing outside. I am concerned for people who are outside all day!