But it is environmental destruction that most worries Tibetans. Scientists have documented significant problems brought by the ravages of the Gyama mine, which belongs to China Gold International Resources Corporation, a company based in Vancouver, British Columbia, that is a unit of the state-owned China National Gold Group.
A paper published in 2010 by Science of the Total Environment, a journal, discussed the impact of mining activities on the surface water in the valley, including on streams that feed the Lhasa River. The researchers found elevated concentrations of six metals in the surface water and streambeds in the middle and upper reaches of the valley. These “pose a considerably high risk to the local environment,” according to a summary; meanwhile, pools of heavy metals were “a great potential threat to downstream water users.”
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