Air quality explained at 'Stomp' Ron Medvescek/Arizona Daily Star Mar 7, 2013 Emily Schweigert, 9, displays a sign listing sources of particulate matter as her mother, Karen Wilhelmsen, explains the concept of air pollution. Ron Medvescek/Arizona Daily Star As featured on +4 Air quality explained at 'Stomp' Recommended More LATEST LOCAL OFFERS JD's Auto Glass Windshield chipped? Let JD's Auto Glass help you out, we will even handle the insurance claim. Call us today! Tucson Surveying & Mapping LLC Building a new facility? Contact Tucson Surveying & Mapping to learn more about Topographic Surveying KU Studios Home of Kids Unlimited There's Always Something Happening @ KU Studios. Now Accepting New Students. Click Here for More Information.