California's rich history includes a fascinating chapter of the Old West and mining towns that played a significant role in shaping the state's identity. From the Gold Rush era to the Wild West days, ...
Artisanal and small-scale gold mining in Brazil’s Tapajós River Basin emits 16 metric tons of CO2 per kilo of gold produced, and 2.5 metric tons of mercury annually, a study has found. Researchers ...
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