Gisele Bundchen was named the most eco-friendly celebrity at the annual Green Awards in London in 2011. She is involved in several environmental campaigns and is a Goodwill Ambassador for the United Nations' Environment Program, helping to launch safe water initiatives and anti-foresting movements.

She was also honored as the Best Green International Celebrity in 2011.

She doesn't just talk the talk. The model and her husband Tom Brady lived in a $50 million eco-friendly mansion in Brentwood, Calif., prior to putting it on the market. Among other things, it boasts numerous solar energy panels on the roof. Ninety percent of the materials used to rebuild the home were refurbished.

She offered several tips in "Architectual Digest" about green living, including using LED lighting and motion sensors, unplugging electronics when they're not in use, turning off water while brushing teeth, reusing wastewater for the garden, growing one's own fruit and vegetables, composting, and recycling.

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