Uranium mining is a dirty business and if we're going to be needing a lot more of it due to expansion of nuclear and leaving the mining to the lowest bidder it will be very polluting.
I think it’s pretty questionable to suggest it’s easy to recycle, hence the mining of the material isn’t of consequence.
And if we’re just being offhanded then apparently thorium is a replacement for uranium, or there’s the ability to reprocess used fuel again for nuclear power.
Those materials are mined also. At least forethought is given to handling/disposal for nuclear since it’s a known issue.