Toxic Shrinkage A composite of 157 brains shows reduced volume because of high lead levels. The red and yellow hotspots are all areas that are smaller than in a normal brain. No wonder lead-exposed children have multiple intellectual and behavioural problems.

CECIL KM, BRUBAKER CJ, ADLER CM, DIETRICH KN, ALTAYE M, ET AL. (2008) DECREASED BRAIN VOLUME IN ADULTS WITH CHILDHOOD LEAD EXPOSURE. PLOS MED 5(5): E112. DOI:10.1371/JOURNAL.PMED.0050112