https://www.nytimes.com/reuters/2019/12/04/business/04reuters-gle...

https://www.nytimes.com/reuters/2019/12/04/business/04reuters-glencore-cobalt.html

"Glencore and China dominate global production of cobalt, which is concentrated in Democratic Republic of Congo, prompting concerns about conflict and artisanal labour.
Glencore and SK Innovation said they were committed to ensuring ethical and responsible production and the companies agreed the Congolese operations would be independently audited each year against a due diligence standard defined by the Responsible Mining Initiative."