February 21, 2012 8:44 am Bad Air Bad Health New studies link poor air quality to health problems. Reporter Richard Piatt speaks with Dr. Brian Moench, president of Utah Physicians For a Healthy Environment about the reports. US & World Videos 1:43 Traces of bird flu virus found in 1 in 5 samples of pasteurized milk, FDA says 2:42 Mother, surrogate celebrate a perfect ending to their long journey 1:12 Watch: Why vaccines are contributing to improved public health 1:53 The Helix School in San Rafael growing with the community 3:33 Bay Area sees slight improvement in air quality, annual report shows