Concerns regarding the safety and environmental impact of large-scale chemical manufacturing facilities were also raised during this period. Silent Spring, published in 1962, alerted its readers to the harmful effects of DDT, a potent insecticide[citation needed]. The 1974 Flixborough disaster in the United Kingdom resulted in 28 deaths, as well as damage to a chemical plant and three nearby villages[citation needed]. The 1984 Bhopal disaster in India resulted in almost 4,000 deaths[citation needed]. These incidents, along with other incidents, affected the reputation of the trade as industrial safety and environmental protection were given more focus.[23] In response, the IChemE required safety to be part of every degree course that it accredited after 1982. By the 1970s, legislation and monitoring agencies were instituted in various countries, such as France, Germany, and the United States.[24]