November 17, 2008 11:50 am Top 5 Green Celebrities NBC’s “The Buzz” runs down About.com’s top five environmentally-friendly celebrities: George Clooney, Cate Blanchett, Robert Redford, Cameron Diaz & Leonardo DiCaprio. US & World Videos 1:45 NYPD enters Columbia University in riot gear to clear protest 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look 1:01 Biden administration plans to reclassify marijuana as a Schedule III drug 2:28 King Charles returns to public duties amid cancer diagnosis