Sketches, stand-up routines and videotaped vignettes are featured in this comedy event, which raises awareness for environmental issues, including global warming. The slew of comedians slated to appear include Jack Black, Larry David, Will Ferrell, Julia Louis-Dreyfus, Bill Maher, Steve Martin, Ray Romano, Martin Short, Ben Stiller and Robin Williams. Also: Leonardo DiCaprio, Senator John McCain and Robert F. Kennedy Jr. Taped Nov. 17, 2005, from the Colosseum at Caesars Palace in Las Vegas.