Investigation on the intelligence quotient of children in the areas with high REE background (Ⅰ)-- REE bioeffects in the REE-high areas of southern Jiangxi Province

In China,rare earth elements(REE)are widely utilized in agriculture.Many studieson REE toxicology,pharmacology and biochemistry have been made both at home andabroad.However,REE damage to the functions of human memory,thinking andreasoning in animal experiments cannot be directly demonstrated.