| http://www.w3.org/ns/prov#value | - ???Anthropogenic sources associated with the elevated concentrations of silver in nonliving materials include smelting, hazardous waste sites, cloud seeding with silver iodide, metals mining, sewage outfalls, and especially the photo processing industry.??? Silver leaches into groundwater, streams, soil, and the root systems of plants. ???Silver was measured in particular samples from rural and ur
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