February 21, 2012 11:44 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 8:39 Gina Rodriguez gushes 0ver motherhood with son Charlie 2:22 Scarlett Johansson and Colin Jost have date night at White House Correspondents' dinner 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 2:05 How ‘Love Is Blind' made Vanessa Lachey and Nick Lachey's marriage stronger 1:18 14-year-old accidentally kills his brother with a gun found in an alley