Celebrities use their star power to increase public awareness for a variety of causes. Here is a short list of household names who use their fame for good.
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Brad Pitt views the Global Green USA sustainable design architecture competition finalists on Aug. 31, 2006 in New Orleans. Pitt and Global Green USA created a sustainable design architecture competition to showcase affordable, energy-efficient construction. The competition drew entries from around the world. (Photo by Mark Mainz/Getty Images)
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