Just how dirty is the air you breathe? The American Lung Association's annual report of the most polluted cities in the U.S. rates communities on levels of ozone, sulfur dioxide, air-borne particulates and tainted tap water. Here are the 20 cities most polluted by year-round particle pollution:
Email us a picture of you and your pet and we'll use it in out Pet Walk segment which airs every weekday morning at 6:40. Include your name, your pet's name and where you're from. Email to email@example.com.