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Results showed that iron oxide dosages significantly diminished the simply available arsenic from the soil.18 Other minerals, including red ochre and also the copper mineral malachite, had been utilised as pigments. The oldest regarded underground mine on the earth was sunk a lot more than 40,000 decades back at Bomvu https://elliotcjptw.kylieblog.com/37282869/rumored-buzz-on-geopolitical-risk

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