One reductionist interpretation of the joint effect of these two strategies was to: a) hand over chemical-free and gravity-based concentrators to boost extraction of the gold so that small and artisanal miners wouldn’t need to use mercury and install “changfangs” on riverbeds, whilst b) monitoring all these operations using drones and remote observatories all over the country. Drones and centrifuge-concentrators, in short.
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