A man displays a coltan ore at the SMB mine near the town of Rubaya in the Eastern Democratic Republic of Congo, August 13, 2019. REUTERS/Baz Ratner
RUBAYA, Democratic Republic of Congo (Reuters) - In a small shack overlooking muddy pits hewn out of eastern Congo's rolling green hills, a government official puts a barcoded tag on a sack of ore rich in tantalum, a rare metal widely used in smartphones.
With a handheld device linked to a server in the cloud, the agent scans the barcode, uploading data including the sealed bag's weight, when it was tagged, and by whom.
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