Originally Posted by vrivasfl
When Superman was exposed to the air on Zod's ship that mimicked the Kryptonian atmostphere, he reeled in pain, feel to his knees, and coughed up blood. I would assume if actual Kryptonite were introduced in the series, it would have a similar effect.
When I first saw that, I thought that was how Kryptonite was going to be used in this new universe. And then the World engine might have tera formed some of the Earth, thus giving Krypton's atmosphere a physical form.