The Subways Are Filled With Foot Farts

Photo: Joe Raedle/2011 Getty Images

"Every time you step down, you pressurize the air that’s in your shoe. ... You stomp down, you squirt out a little warm air, carrying foot microbiology."— Dr. Norman R. Pace, a University of Colorado microbiologist, on the results of a survey of New York's subway air quality, which, while not dangerous, is pretty disgusting.