Low levels of lead linked to lower test scores in children
![peeling lead-based paint](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/04/bm_leadpaint_free.jpg?fit=860%2C460&ssl=1)
The most common source of lead exposure in kids is lead-based paint. Researchers find that even at low levels, lead exposure is associated with lower reading and math scores in young children.
Bart Everson/Flickr (CC BY 2.0)