Quality Check: What's In The Air Kansas City Breathes?

Leticia DeCaigny measures air quality in Kansas City, Kan., and says the rail yards in the neighborhood contribute to air quality issues.
Credit Sneebly / Flickr, Creative Commons

A recent community meeting gathered in response to high levels of sulfur dioxide pollution in neighborhoods near downtown Kansas City. What's in our air, where is it coming from, and what exactly do our lungs do with the contaminants we breathe, anyway?