in the 1920's, when most major u.s. cities knew enough about lead to not want to use it for water pipes any more, the lead industry association began a propaganda campaign questioning the science behind proposed bans. that caused enough doubt and confusion to install more lead water pipes for another 50 years.

the crime rate worldwide has been steadily dropping ever since lead was banned from gasoline - a change that the oil companies fought.

lead exposure causes headaches, inhibits iq, and can lead to aggressive or dysfunctional behavior. long term, lead can be absorbed into bones, teeth and blood. it causes kidney damage, inhibits body growth, causes abdominal pain, anaemia and can damage the nervous system,