Bloomberg reporters try to uncover the secrecy haunting China’s solar polysilicon factories in Xinjiang

The world’s solar power surge depends on polysilicon from factories in Xinjiang, China. No one really knows what’s going on inside the facilities.

The veil over Xinjiang has made the search for answers about the links between China’s labour program and its solar industry a job for outside researchers—who, it turns out, have found potentially telling details just by combing through public records.

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