About 800 million children around the world, or 1 in 3, have levels of lead in their blood that is “cause for action,” according to a U.N.-led study. There is actually no safe level of lead exposure for children, who absorb 4-5 times more lead than adults, according to health authorities.
Sources of lead exposure include improperly disposed lead batteries, leaded pipes, paint, gasoline, cosmetics, toys and other consumer products.
Exposure negatively impacts IQ, attention span and behavioral health, leading to poor academic performance and increased risk of violence and crime. Physical effects include headaches, abdominal pain, growth deficiency and impaired vision and hearing.
Reducing lead exposure in the U.S., where it is already low, would return at least $3.10 for every dollar spent. In less affluent countries where exposure is higher, the benefits would likely be much greater.