More than any other product used to make lithium-ion batteries there are real concerns about the limited supply of cobalt, which has pushed the price up 80% this year. The problem: 60% of the world’s cobalt reserves are in the Democratic Republic of Congo, where political instability and violence have created a serious moral dilemma for miners and companies such as Tesla and Apple. The United Nations has reportedly found scores of mass graves this year, with deaths that they link to government forces. This has led some companies to pull out of mining and focus on resources elsewhere, especially in Canada. Still, the sheer scale of the resources in the DRC means there will be a struggle to produce a sufficient supply.
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