Avatar I think is the most famous science fiction film in 2009, is written and directed by James Cameron. The story is in 2154, humans are mining a precious mineral called unobtanium on Pandora star, the expansion of the mining colony threatens the continued existence of a local tribe of Na'vi, in order to protect their life environment, Na'vi begin to resist humans. I think the first thing the film want to talk us is our human should to cherish our environment,protect Earth, if not the end must is human extinct, like the last of the film, humans action enraged nature, all biont revenge to human that human have to get out this star. The second one is about love, the film want more love between humans, not use war to solve problem, if everyone is friendly to each other, this world must become more beautiful.This is the film's true essence want to tell us.