If there is one thing that a celebrity wants, it’s for people to think he/she is a good, philanthropic charitable person. One of the best ways they can do this, it seems, is by demonstrating care about the environment.

Celebrities from Alicia Silverstone to John Travolta have “gone green” by various means lately, and some more authentically than others. Here’s a roundup of the greenest (and faux-greenest) celebs:

Alicia Silverstone: If you haven’t had enough of the former Clueless star and her horrifying parenting skills, here’s a little more: The actress behind Cher Horowitz’s dramatic love story launched her website The Kind Life in 2009, accompanied by her vegan guide, The Kind Diet. Silverstone has also found ways to make strides for animal rights activism – she appeared nude in a PETA commercial, then named her son Bear Blu. Apparently, she’s not just “a ditz with a credit card.” 

Harrison Ford: In this heeby-jeeby-inducing video, the Indiana Jones star and heartthrob-to-moms-everywhere pledges to raise awareness for rainforest deforestation by showing that destroying forests can hurt everyone around the world (huh?). That’s right, he’s waxing his chest hair. Our guess is that he just wanted to relive the glory days of the Kingdom of the Crystal Skull.

Daryl Hannah: Most people know that Daryl Hannah, the 80’s star of Bladerunner and Wall Street, has made a name for herself as the Queen of Green—from renewable energy to climate change to the Keystone XL pipeline, Hannah has protested (and been arrested) for it all. One of her more extreme stunts, however, was in 2006, when she spent three weeks living in a walnut tree to protest the sale of a community garden in LA. She was arrested for trespassing after police cut off the branches around her. Sticking to her guns, the uber-activist was brought down by cherry picker, fist raised in solidarity.

John Travolta: Although we hate saying this to our beloved, dimple-cheeked Danny Zuko, Travolta is probably the biggest green-hypocrite around. While he has urged for the necessity of developing alternative energy sources, the Wild Hogs star owns five private jets and has a carbon footprint nearly 100 times the average person’s, according to The Daily Mail. But never fear, Travolta has a backup plan: “I’m wondering if we need to think about other planets and dome cities,” he said.