The founder of World Wildlife Fund in 1960s He chooses a sustainable lifestyle by making environmentally conscious choices. He is a legendary filmmaker and broadcaster, He uses his social networking sites like Twitter to encourage his followers to take climate actions The royal family has always encouraged him He established The Leonardo DiCaprio Foundation He has used film as a medium to raise awareness among people He serves as a very influential role model of environmental conservation. He has asked to initiate climate actions to save the planet. One of the most outspoken environmentalists in Hollywood He is an actor who fights for the critical environmental issues The Duke of Sussex is one of the great environment campaigners