Leonardo DiCaprio and a list of Hollywood's finest have just released a public service announcement encouraging people to petition Congress to pass the Clean Energy & American Power Act aka cap and trade.
The ad was paid for by the left-leaning NRDC Action Fund, a group whose board of directors includes Ari Emanuel, the brother of White House Chief of Staff Rahm Emanuel, and John Podesta, Bill Clinton's former Chief of Staff.
The PSA encourages viewers to click on an embedded link which sends them to a petition saying the following (video embedded below the fold, h/t Story Balloon):

NBC's resident
As part of its celebration of Earth Day, NBC's "Today" show invited on actor/environmentalist Ed Norton to promote his National Geographic special on PBS and the "Fight Club" star actually decried America's environmental progress compared to China as he charged the U.S. had to "catch up," to them in the area of banning plastic bags.