This may seem extremely stupid, but what if we did the following: 1. Grinded up nuclear waste. 2. Mixed it with tonnes and tonnes of radio-inactive earth. 3. Put it back where we mined the uranium in the first place. I understand that most of nuclear waste is just uranium, the remainder is more active radioactive isotopes like cesium and iodine. So how would the area be any more radioactive than before the uranium ore was mined, especially after the more active elements had decayed to reasonable levels? A problem I see is the chemical toxicity/affects, not related to radiation, of some of the compounds/elements within the spent fuel.