I rewatched Silent Running (1972). Directed by Douglas Trumbull and starring Bruce Dern this this is a significant science fiction film. Trumbull was heavily involved in 2001 (1968) and later the first Star Trek film (1979) and Blade Runner (1982). John Dykstra was also involved and later was involved with the first Star Wars film and also the first Star Trek film.
Storyline is a touch simplistic and is about a botanist's attempt to preseve the last of Earth's plant life being kept on his space craft. One of the script writers was Michael Cimino in his first work in film. Another writer was Steve Bochco who became one of the best known writers in television.
Interesting music score by Peter Schickele. It includes 2 songs sung by Joan Baez.