China Stresses Prevention Of Heavy Metal Pollution After Child Lead Poisoning Cases. cbsnews, Seotember 09, 2009. China needs to work harder to fight heavy metal pollution following the recent discovery of clusters of severe lead poisoning involving hundreds of children, the country’s environment minister said Thursday.More than 1,300 children in central Hunan province, 200 in Yunnan province and at least 615 in northern Shaanxi province tested positive for lead poisoning in the last month. Lead poisoning can damage the nervous and reproductive systems and cause high blood pressure and memory loss. [ See ]