Linked from
The 31 pages that link to Radioactive contamination, each with the reason it gives.
RadioactivityRelated: Dispersed radionuclides can expose organisms long after an initial release.
Gas mantleRelated: Broken thorium-containing mantles can disperse radioactive dust.
Severny IslandRelated: Nuclear tests left contamination concerns in parts of the archipelago.
Dirty bombRelated: Contamination, rather than nuclear blast, is the weapon’s defining hazard.
Malden IslandRelated: Nuclear testing raises questions about contamination at the former test site.