"How to Tame a Wild Volcano"
Superman strives to save an island soon to be devastated by a volcanic explosion. He finds that he losses his powers just when he really needs them.
"Fabulous World of Krypton: Prison in the Sky"
When prison population becomes a problem, Jor-El introduces a gas that can cause suspended animation. When used, prisoners can be placed in an orbit around Krypton to serve their terms.