From Man of Steel
Will you not understand? Krypton's core is collapsing! We may only have a matter of weeks! I warned you, harvesting the core was suicide! It has accelerated the process of implosion!
Our energy reserves were exhausted. What would you have us do, El?
Look to the stars, like our ancestors did! There are habitable worlds within reach. We can begin by using the old outposts.
Are you seriously suggesting that we evacuate the entire planet?
No, everybody here is already dead. Give me control of the Codex. I will ensure the survival of our race. There is still hope. I have held that hope in my hands...