March 26, 2009 6:28 pm Ground Level Ozone Exposure Linked to Respiratory Disease Long term exposure to ground level ozone, produced by car exhaust and smoke stacks, is linked to deadly respiratory disease. 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 2:30 ‘Baby Reindeer': Inside Richard Gadd's Netflix phenomenon