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Gisele Bundchen

The mega-model was hailed the Best Green International Celebrity in December, winning the online poll by a large margin, thanks to her work in ecological conservation and education. Through her eco-friendly flip-flop line — Ipanema Gisele Bundchen — the supermodel has raised funds for conservation efforts in the Amazon and Atlantic Rainforest.

She also launched the Clean Water Project with her family, whose mission is to restore vegetation and the microbasins in her hometown of Horizontina, Brazil. In 2011, Harvard’s Center for Health and Global Environment named her the year’s Global Environmental Citizen, and in January this year, she made her first official visit to Africa as Goodwill Ambassador for the United Nations Environment Program.

Photo: Simon Malina | AFP | Getty Images