The agency said studies on the environmental and human health assessments have identified that gold stamp milling centres are the main centre of mercury pollution. Mercury was found in air, sediments and soil, with the largest concentration being air. Results also showed that mercury pollution of water and soil is limited to a radius of less than 5km from the milling centres. Most of the mercury ends up accumulating in the aquatic food chains
https://www.newsday.co.zw/2017/08/12/disaster-looms-deserted-mashava-gold-mines/
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