The electric car holds the promise of a clean ecological transition. The global automotive market is focusing its efforts on competitive production, the key to which is the exploitation of the blue gold, cobalt. This mineral, which is essential for batteries, is mined mainly in the Congo. But at what price? The exploitation of the local workforce, but also the pollution generated by the extraction, are totally invisible to European consumers, who only see the result: a vehicle that does not emit CO2 when it is driven, but ignore the dramatic conditions of its manufacture.