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Cobalt is used in modern batteries.

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But where does it come from?

https://www.rt.com/shows/documentary/549241-congo-cobalt-mining-health-issues/

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    Cobalt is used in wooden worktop oil as a dryer, I guess it comes from the same place.

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    Cobalt is used in wooden worktop oil as a dryer, I guess it comes from the same place.

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