Kid in backseat: "What do you think?"
Alien disguised as human: "About what?"
Kid: "Should we run -- or stay and fight?"
Kid: "What should we do then?"
Alien: "There's nothing you can do."
-- The Day the Earth Stood Still (2008).
Remember: it's not "our Earth." It belongs to all. And if we mistreat it, it will be taken away from us and given to someone else.