Adrian is in the list of 7 greenest celebrities according to Marie Claire:

Unlike the character he plays on TV, Entourage star Adrian Grenier cares about the environment – no he doesn’t drive a bright yellow Hummer in “real life!” Grenier prefers driving a Prius, living in a fully “green” house (solar roof, reclaimed floors, recycled blue-jean insulation, blah, blah, blah), and offsetting. In 2007, Grenier drew massive attention to Charity Water, a non-profit initiative that sets up drinking water and sanitation infrastructures in the world’s most impoverished communities. Word in the ‘Hood says Grenier is “fully committed to educating any lady who dares walk into his green life.” According to environmental gossip site Ecorazzi.com, Grenier said, “if a woman isn’t environmentally conscious, she will be after going out with me.”