Around the world, governments and automakers are promoting electric vehicles as a key technology to curb oil use and fight climate change.
Like many other batteries, the lithium-ion cells that power most electric vehicles rely on raw materials - like cobalt, lithium and rare earth elements - that have been linked to grave environmental and human rights concerns. Cobalt has been especially problematic.
Mining cobalt produces hazardous tailings and slags that can leach into the environment, and studies have found high exposure in nearby communities, especially among children, to cobalt and other metals. Extracting the metals from their ores also requires a process called smelting, which can emit sulfur oxide and other harmful air pollution.
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