This is a spoiler free scene from the 1972 movie 'Silent Running' to create interest for this great film.

Freeman Lowell (Bruce Dern) works aboard a spaceship as a caretaker that carries some of the last remaining trees and plants from Earth.

The environment on Earth has become too hot to sustain most plantlife, so it was blasted off into space in the hope it could return one day.

Now that it is decided that the domes on the ships containing the forests are to be blown up, and that the whole project is thus canceled... (less info)