Thomas Midgley
Thomas Midgley (18 May 1889 – 2 November 1944), was an American inventor. His two most famous inventions are both now banned because they are dangerous for the world environment: the use of lead in petrol (gasoline)  and the use of chlorofluorocarbons (CFCs) in refrigerators.  Midgley was accidentally killed by something he was inventing.