Comment by ashoeafoot
2 days ago
Dont forget cobblestone in regions with high natural radioactive materials. If they mine for uranium in the rocks the rocks used to pave the surface and build houses are going to be also mildly active .
2 days ago
Dont forget cobblestone in regions with high natural radioactive materials. If they mine for uranium in the rocks the rocks used to pave the surface and build houses are going to be also mildly active .
Granite benchtops.