The Day The Earth Stood Still English Movie

A representative of an alien race that went through drastic evolution to survive its own climate change, Klaatu (Keanu Reeves) comes to Earth to assess whether humanity can prevent the environmental damage they have inflicted on their own planet. Klaatu himself already has a negative opinion of humans, and when barred from speaking to the United Nations, he decides they shall be exterminated so the planet - with its rare ability to sustain complex life - can survive. It is up to Dr. Helen Benson (Jennifer Connelly) and her stepson Jacob (Jaden Smith) to convince Klaatu humans are worth saving: but it may already be too late.