This week the Centers for Disease Control and Prevention lowered the lead-poisoning limits for kids, from 10 micrograms per deciliter of blood to 5 mcg.

It's a change that's long overdue, according to health experts. Exposure to lead, even in small amounts, can cause developmental delays in young children.

"With that change, the number of kids in the U.S. who would be considered to have lead poisoning that needs medical attention would rise to nearly a half-million, almost double the number before the change," according to NPR.

Continue at: http://www.npr.org/blogs/health/2012/05/16/152852097/cdc-cuts-lead-poisoning-limit-for-kids

Check out HealthTeacher's K-12 lesson plans on community and environmental.
http://www.healthteacher.com/lesson/ScopeAndSequence