Name the American actor, film producer and environmentalist activist who co-wrote the '11th Hour', a 2007 documentary film about the state of the natural environment, distributed by Warner Independent Pictures?
Leonardo DiCaprio Leonardo Wilhelm DiCaprio ( ; born November 11, 1974) is an American actor, film producer, and environmental activist. DiCaprio began his career by appearing in television commercials in the late 1980s, after which he had recurring roles in various television series such as the soap opera "Santa Barbara" and the sitcom "Growing Pains". He began his film career by starring as Josh in "Critters 3" (1991). He starred in the film adaptation of the memoir "This Boy's Life" (1993), and was praised for his supporting role in "What's Eating Gilbert Grape" (1993). He gained public recognition with leading roles in "The Basketball Diaries" (1995) and the romantic drama "Romeo + Juliet" (1996), before achieving international fame with James Cameron's epic romance "Titanic" (1997), which became the highest-grossing film of all time until Cameron's science fiction film "Avatar" (2009) overtook it.
Michael P. Nash Michael P. "Mike" Nash is an American film director, screenwriter and producer. He has directed the films "Climate Refugees", "Fuel" and "Nebraska". His films have won several domestic and international awards. During the Copenhagen COP15 conference Nash, considered an expert on environmental migration, helped the UN frame the issue of environmental migrants. At the 2010 Sundance Film Festival, where his film "Climate Refugees" was shown, Robert Redford stated that "["Climate Refugees"] can be an agent for social change." "Climate Refugees" was also shown at the L.A. Film Festival and was screened by the United Nations. Recently he was award Senator Barbara Boxer's Conservation Champion Award and the Neiman Marcus Environmental Filmmakers Vision Award at the Dallas International Film Festival.