The movie Water World is about Earth's global warming, which happens in the future. Rising sea levels and oil spills are to blame. (Think about the Book of Genesis long ago...)
The movie Total Recall is about mutants on Mars, where people can't enjoy life naturally due to the problems. Instead people buy good memories from before Mars was ruined by excess work and technology. The movie is very long, but if you skip to the end they show how the characters aren't even sure about the time they are living in. It may be the past or the future, or a dream about the future mistaken for the past, or a real future where the past is really the future and not the fake past which they bought.