We all know the danger that resides in lead-laden paint chips peeling off the walls of old homes. It’s well understood that lead is poisonous and, even in small doses, can harm brain function and cause learning disabilities in children. Lead also is associated with impairment of the cardiovascular, reproductive, kidney and immune systems of adults.
That's why a USA Today investigation documenting the high amounts of lead children are exposed to in several communities across the nation is so alarming. But more on that later.