April 21, 2009 12:20 pm Slim Down to Save Earth A new study shows populations with heavier people contribute more harmful gases than thin people. 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