The full-length Academy Award-nominated documentary If a Tree Falls: A Story of the Earth Liberation Front, which premiered on P.O.V. last year, is now streaming on the show’s website through March 4. The film, exploring environmentalism and terrorism, is up for the documentary feature Oscar this Sunday (Feb. 26). It’s a co-production of ITVS, directed by Marshall Curry, and won best documentary editing at the 2011 Sundance Film Festival.