7 sci-fi movies with plausible eco-themes: It could happen
Floating mountains on Pandora, from "Avatar." (ZUMA Press)
Gattaca and Children of Men are already pieces of our world today. Check out what flouride in our water and aspartame slowly do to our fertility. And scientists can grow a human ear on the back of a rat. we have been fiddling with all of this for the past 30 years. These movies are more real than all of you want to admit.... well some of them.
What about Damnation Alley? Radiation everywhere and just small areas that have levels that are tolerable, forming a road from California to New York.
Perhaps this entry is referring specifically to the environmental disaster scenario of these films instead of the films' overall plots. If not, then it is highly unlikely that people with spaceships and advanced weaponry in "Avatar" would attack a giant tree by pushing crates of explosives out the back door of an orbital vehicle, instead of using cruise missiles or orbital bombardment.
It's amazing how prescient some sci fi movies turn out to be - Children of Men is probably one of my favorites - dark and depressing, but wholly possible. Just like the films at http://www.filmcrave.com/list_genre_movie.php?genre=Sci-Fi