King GustafPhoto: Milton Correa 10. King Carl Gustaf of Sweden

What do you have in common with the King of Sweden? If you recycle, then you’d feel right at home in his private kitchen, separating your imperial plastics from your aristocratic cans. King Carl Gustaf attributes his love for the environment to time spent outdoors with his nature-loving mother, but was inspired to take action against climate change after a voyage on an icebreaker with international climate scientists in 2004. He has since installed a pellet-fired boiler at Drottningholm Palace and launched a campaign to raise global awareness about climate change, an effort that won him special recognition in the U.N.-HABITAT Scroll of Honor in 2006. The king reconciles his love for cars with his concern for the environment by advocating for alternative fuels.