The dredges are equipped with a metallic arm known as a “pineapple,” which stirs up the riverbed. Large hoses bring the mud up to a conveyor belt, where mercury is used to separate gold from other sediments. The waste is then thrown back into the river, contaminating the water consumed by traditional communities. A recent study showed high levels of mercury in the Madeira River.
read more... https://news.mongabay.com/2025/02/mining-dredges-return-to-amazon-rivers-main-tributary-months-after-crackdown/
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