Đang chuẩn bị nút TẢI XUỐNG, xin hãy chờ
Tải xuống
Lead is toxic to cognitive and behavioral functioning in children even at levels well below those producing physical symptoms. Continuing efforts in the U.S. since about the 1970s to reduce lead exposure in children have dramatically reduced the incidence of elevated blood lead levels (with elevated levels defined by the current U.S. Centers for Disease Control threshold of 10 μg/dl). | Lead exposure and the 2010 achievement test scores of children in New York counties
