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Small-scale mining for gold has produced long-lasting toxic pollution, from 1860s california to modern peru.By jacqueline gerson, austin wadle and jasmine parham, the conversation.
We are a large-scale joint-stock enterprise integrating scientific research, production and sales.Our leading products have crushing equipment, sand making equipment, mobile crusher, etc., Each type of product is with complete specifications. All products have passed ISO9001, CE and GOST international quality system certification.