Bill Hammack makes instructional videos about engineering in everyday life. In this episode he explains why the conflict mineral Tantalum is used to make cell phone capacitors smaller. Even though only 2% of the raw ore Coltan originates in the Congo, it is impossible to trace in its refined form, which means that the 40mg in your phone could play a role in the 5+ million murders in the region since 1994.
Capacitors from the Congo
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