The award -- which will be presented to DiCaprio by longtime friend and fellow friend of the planet Cameron Diaz -- is part of Nickelodeon 's Big Green Help campaign -- a multiplatform , global pro-social campaign designed to empower kids to take action on the environment and connect them to energy saving and earth-friendly activities in their everyday lives . Created for the more than half of U.S. kids who say they are concerned about the environment ( source : Nickelodeon / Pew Center 's " Keeping it Cool : Kids , Parents and the Global Environment " Research ) , The Big Green Help aims to fashion a new generation of environmentalists for whom green will become not only a cause , but a way of life .