Miners chewing coca leaves: Chewing around 40 to 80 coca leaves at the time, miners get the energy they need to stay underground for about 12 hours a day without eating, looking for silver or copper. Miners chewing coca leaves: Chewing around 40 to 80 coca leaves at the time, miners get the energy they need to stay underground for about 12 hours a day without eating, looking for silver or copper.

Miners chewing coca leaves: Chewing around 40 to 80 coca leaves at the time, miners get the energy they need to stay underground for about 12 hours a day without eating, looking for silver or copper.

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