Unlicensed mining, especially for gold, has already killed hundreds of people and devastated thousands of hectares (acres) in the Amazon forest, where miners have set up camps that destroy everything in their path.
To extract each ounce of gold, it takes two or three ounces of mercury, which fouls waterways after being poured into rivers from the mining sites. In their search for water, the miners raze tropical forests using bulldozers.
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