an inconvenient truth is a 2006 documentary movie about global warming directed by davis guggenheim, presented by former united states vice president al gore. the movie was first shown at the 2006 sundance film festival. it opened in new york and los angeles on may 24, 2006. the movie was released on dvd on november 21, 2006. a companion book by gore reached number 1 on the paperback nonfiction new york times bestseller list on july 2, 2006. the movie won academy awards for best documentary feature and for best original song.