https://theconversation.com/gold-rush-mercury-legacy-small-scale-mining-for-gold-has-produced-long-lasting-toxic-pollution-from-1860s-california-to-modern-peru-133324
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5/28/20 at 12:15pm
Small-scale gold mining operations in developing countries are major sources of toxic mercury pollution, using techniques that haven't changed much since the California Gold Rush 150 years ago.
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