Town of Wendell, Massachusetts

The loner crew member of a spaceship harbouring Earth's last nature reserves goes renegade when he is instructed to jettison his beloved forests and return home. Accompanied only by three robots, he ponders the fate of his last pocket of nature and the murders of his fellow crew members in this far-looking speculative film.

Review from IMDB:

You Can't Blow Up My Forest

Author: Etherdave from Edmonton, Alberta

Universal Studios funded several low-budget productions in the early seventies. By far the best to come out of this program was 'Silent Running', an ecologically-minded 'message film' that stands out today as one of the truly great films of the science-fiction genre.

Bruce Dern stars as Freeman Lowell, a futuristic Park Ranger minding Earth's last forests, sealed in gigantic domes aboard an equally gigantic freighter in space. When ordered to destroy the domes and return home, Lowell is forced to choose between his crewmates and his beloved forests.

The motif of a polluted, or simply, homogenized Earth, the ultimate triumph of human progress over nature and wilderness, is a standard theme of science fiction in the 20th century, and the film is not too different from many other films and episodic television programs seen since the postwar period. Rarely, however, has the theme been explored from the point of view of ecological ethics. The storyline is kept deliberately simple, and asks not the question 'How Would You Act In Such A Position', it merely shows how one particular man might. The characters are given seminal, yet subtle opportunities to flesh themselves out (comments made during meals and card games are particularly noteworthy), and even if the character of Lowell is ultimately dislikeable, he remains oddly sympathetic. Dern produces a remarkable performance here, as a tortured, perhaps even mentally-ill, loner. His work here is still fresh and understated and certainly not of the over-the-top calibre, despite the insistances of some.

The film possesses truly amazing visual images, from the spacecraft itself (the decommissioned and soon-to-be-scrapped aircraft carrier Valley Forge) to the domes (an aircraft hanger at Van Nuys Airport) to the unforgettable Drones, uncanny little robots designed around the amputee-actors that give them life. Visual effects are excellent, the direct prototypes of even more fantastical films to come. The music, composed for the film by Peter Schickele (known internationally as P.D.Q. Bach), is by turns boldly triumphant, softly mournful, and is quite effective; some viewers may hate the vocal work of Joan Baez, but she is a logical choice for this production and time period.

While many films have suffered since the release of 'Star Wars'(which is NOT, strictly speaking, science-fiction) due to dated visuals and obsolete effects technology, 'Silent Running' is still startlingly clean and visionary. A worthy film for all science-fiction fans to see.