Thomas Midgley Jr., also known as "The Man Who Accidentally Poisoned the Planet Twice" was an American mechanical and chemical engineer. He played a major role in developing leaded gasoline and some of the first chlorofluorocarbons (CFCs), better known in the United States by the brand name Freon; 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.
