I was somewhat leary when I first heard of this movie, as there hasn't been a really good hard -core science fiction movie in years. I don't count Star Wars, because it's too fantasy based in many parts of it, though I love it dearly...at least the first three.
The entire film focuses on family. That special unit of humanity that has become more and more missing in America, and which this film emphasizes in importance. A focus which leads to its triumphant ending and to an uplifting and hopeful view for mankind.
If you haven't seen this film, you should, if for no other reason than to remind yourself that climate change is real and if we don't do something now, then the film will not be a what if, but a what when!