 How will finding uranium on Mars aid the problem on Earth?
The planet itself was tough enough—barren, desolate, forbidding; enough to stop the most adventurous and dedicated. "The surest way to die out here on Mars is to give up." Nothing but what had stopped us could stop a sandcat: sand in the delicate mechanism of the atomic engine. But no; she blamed it all on me somehow: So we were out walking on the spongy sand of the Martian desert. "Maybe there isn't any uranium in this sector at all. She had been just as much inflamed by the idea of coming to Mars to help in the search for uranium as I was. We knew the pay was poor, but we had felt it a sort of obligation, something we could do as individuals to keep the industries of radioactives-starved Earth going. No, we had decided together to come to Mars—the way we decided together on everything. I longed to lie down on the soft, spongy Martian sand and bury myself. I stopped, slipped out of the geiger harness, and lowered myself ponderously to the ground. Maybe we shouldn't have come to Mars after all. I watched her, sleeping peacefully, a wayward lock of her soft blonde hair trailing down over one eyebrow, and it seemed hard to believe that we'd exchanged Earth and all it held for us for the raw, untamed struggle that was Mars. I thought I knew everyone on sparsely-settled Mars. Earth needed radioactives, and the only way to get them was to get out and look. The great atomic wars of the late 20th Century had used up much of the supply, but the amount used to blow up half the great cities of the world hardly compared with the amount we needed to put them back together again. And that started the chain of events that led Val and me to end up as a madman's prisoners, on Mars. With every source of uranium mined dry on Earth, we had tried other possibilities. Project Sea-Dredge was trying to get uranium from the oceans. So, Mars. There's not much uranium on Mars, and it's not easy to find or any cinch to mine. It's a stopgap effort, just to keep things moving until Project Sea-Dredge starts functioning. Enter the Geig Corps: volunteers out on the face of Mars, combing for its uranium deposits. For a puzzled moment I thought it was our Dome, the settlement where all of UranCo's Geig Corps were located, but another look told me that this was actually quite near us and fairly small.
 It can hopefully sustain Earth's industries until the underwater project yields results
 In combination with the underwater project, it will give Earth at least 300 more years of fuel  It will cause more problems, because neighboring countries will fight over the small amount of fuel  It will render the underwater project unnecessary  It can hopefully sustain Earth's industries until the underwater project yields results