Comment by JKCalhoun

Yeah, Thomas Midgley Jr., from Wikipedia [1]:

"…played a major role in developing leaded gasoline and some of the first chlorofluorocarbons…; both products were later banned from common use due to their harmful impact on human health and the environment. He was granted more than 100 patents over the course of his career."

As someone else said, this guy's work was so toxic to the planet we ought to ban everything else he ever invented—just in case.

(And weirdly, one of his own machines took his life as well—whether by design or not.)

[1] https://en.wikipedia.org/wiki/Thomas_Midgley_Jr.