Several options. - Bury it underground in geological repositories. These have been extensively studied and are, to the best of our knowledge, more than safe en

Several options. - Bury it underground in geological repositories. These have been extensively studied and are, to the best of our knowledge, more than safe enough. - We can reprocess it and burn it in breeder reactors. The remaining waste will decay to background levels in about 300 years. Oh, and we can shutdown the uranium mining industry for, oh, the next 1000 years while we burn up the uranium we have already dug up. Also keep in mind that while the waste is dangerous, it's absolutely minuscule in volume. All worldwide spent (civilian) nuclear fuel could fit on a football field, stacked a few meters high.