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US adds nickel, zinc to draft critical minerals list, drops potash – by Mariaan Webb ( – November 2021) The US Geological Survey (USGS) has added nickel and zinc to its proposed list of 50 ‘critical minerals’ – defined as those essential to economic or national security and with a supply chain vulnerable to disruption – while four others, including potash, have fallen off the draft 2021 list. The USGS has released its …

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