No frontiers left to conquer

The world is atomfucked, but botanist Freeman Lowell (Bruce Dern) and his crew preserve trees and plants in their spacecrafts. Upon the orders to destroy the orchards for commercial purposes, Lowell gets mad angry and crafts some plans of his own. Finished in 1972, so obviously the scifi tech looks funky and silly, yet in the end that's the only thing you really want to see in this movie.