PV aren't just sand, if they were my windows would be PV. Small impurities matter over long times and large quantities.
Also wrong on long term plan for nuclear. Long term plan is wait. Radioactivity reduces itself with time.
Yes, we need to recycle the materials. Landfill is not a viable solution for any waste, none of that is unique to solar power.
> Long term plan is wait
Waiting a lifetime is easy. Waiting hundreds of generations after we’re dead is not. Is that an argument against nuclear power? Not in my opinion. There’s still no finalized plan describing how waiting will work in practice though.