Preserved hair reveals just how bad lead exposure was in the 20th century
newsdepo.com
A new study reveals the dramatic decrease in lead exposure in the U.S. following the establishment of the Environmental Protection Agency 55 years ago.Preserved hair reveals just how bad lead exposure was in the 20th century
A new study reveals the dramatic decrease in lead exposure in the U.S. following the establishment of the Environmental Protection Agency 55 years ago. Read more

