Upon leaving the cinema, there's too many why on my head.
What happened to earth?
Why won't they find a solution to save the earth?
Why give up on earth?
If the hero managed to see time as something physical, why can't he goes back to the pass?
Why a space station?
Why the other astronout didn't go and search for Dr. Brand?
Why burn the crop when there's already too much air polution? Why? Why? Why!