9. Lung cancer from Asbestos: Asbestos is one of the 19th century's big mistakes.
Recognized for its strength and resistance to fire, manufacturers began splashing the stuff around by the bucket load.
For nearly 100 years, it cropped up just about everywhere, despite causing lung cancer, disease, and early death.
People had suspected since the early 1900s that asbestos might be dangerous, with a high rate of illness and death being reported around asbestos-mining towns.
But it wasn't until 1938 that a study commissioned by asbestos manufacturers conclusively proved that it was basically airborne death.
At this point, those same manufacturers suppressed the findings and denied all knowledge of them.
The result was illness and poverty for hundreds of thousands of workers.
Because there was “no proof” linking asbestos to lung cancer, those who came down with it were ineligible for compensation.
Companies frequently just dropped them, leaving them and their families to die in penniless misery.
And till now this murderous product has not been banned.