"Patterson fought the industry for the next 20 years before lead was finally banned in U.S. consumer products. The man who figured out the age of the earth was also responsible for one of the greatest public health victories of the 20th century.

In just a few years average lead levels in the blood of children plummeted by some 75%. Today the medical consensus is unanimous - There is no such thing as a non-toxic level of lead in humans, however small.

Today, scientists sound the alarm on other environmental dangers. Vested interests still hire their own scientists to confuse the issue. But in the end, nature will not be fooled." - Neil deGrasse Tyson, episode 7 of Cosmos.