Mining machinery on site will crush millions of tons of ore, then use cyanide to extract the gold. The waste, a contaminated sludge of 100 million tons of earth and water, will be stored in a mountain valley behind a 450-foot rock dam. Perpetua says it is a secure design, fortified by liners and a huge rock buttress, but a spill or leak could harm fragile fish populations and do long-term environmental damage.
read more... https://www.nytimes.com/2021/12/27/us/mining-clean-energy-antimony-tribes.html
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