Eighty percent of children in a Northern China province have high levels of lead in their blood. Some 600 children tested with levels at 506 mcg. per decalititre of blood. This according to Chinese athorities is 10 times the limit by China standards.
A little side info, this is over 50 times the legal limit in the U.S. and the U.S. wants to make the current limit even less. A quick lesson on lead. Background levels of lead (that's what you could expect as an average with no high exposures) would be around 6 mcg. The exposure limits for adults working around is at 50 mcg and that's with protection. What does lead poisoning do? It causes brain and central nervous system damage as well as intestinal and kidney problems. This was the reason why they took lead out of gasoline. The dirt by your local road or highway is still contaminated even after all these years of no lead in gas.