Earliest evidence of human-produced air pollution linked to Spanish conquest of the Inca

ENN
Feb 9, 2015, 3:55 pm13 pts
In the 16th century, during its conquest of South America, the Spanish Empire forced countless Incas to work extracting silver from the mountaintop mines of Potosí, in what is now Bolivia—then the largest source of silver in the world. The Inca already knew how to refine silver, but in 1572 the Spanish…

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