In the ship Kals father switches the atmosphere to human so Clark has his super strength back. The forces Zod and his crew to don suits providing Krypton atmosphere, thus killing their super powers.
But right after they return to the Clark farm in their suits (Krypton Atmosphere) but have full superpowers. This goes on through the the next major fight scene. See more
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 ...