text: A Deepwater, New Jersey facility that made this substance was dubbed the "House of Butterflies.
full_question: A Deepwater, New Jersey facility that made this substance was dubbed the "House of Butterflies." RobertKehoe was the foremost proponent of the safety of this material, whose use was opposed by Clair CameronPatterson after finding large traces of it in ocean water and ice cores. Its most prominent manufacturer wasEthyl Corporation. Herbert Needleman's studies of children's teeth and mental development led him toadvocate Clean Air Act regulation of this material. While working under Charles Kettering at General Motors,Thomas Midgley discovered this substance's anti-knock properties and lied about its toxicity. This additive isnow largely replaced with ethanol. For 10 points, name this octane-boosting gasoline additive banned in mostof the world for containing a toxic heavy metal. 
first_sentence: A Deepwater, New Jersey facility that made this substance was dubbed the "House of Butterflies.
raw_answer: tetraethyl lead [or leaded gasoline]