Scientists are particularity uneasy with the use of mercury in gold processing. It is applied to form a gold-mercury amalgam. When heated, the mercury vapourises, leaving the gold. The remnants percolate into the soil or flows to the Mara, eventually finding its way to Lake Victoria.
Novati Kessy, a World Wildlife Fund (WWF) coordinator, said the use of mercury flouted the Minamata Convention on Mercury of 2017. The convention calls for a ban on new mercury mines and the phase-out of existing ones.
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