THIS DAY IN HISTORY:
The Seveso Disaster (1976)
Around noon on July 10, 1976, an explosion occurred in the ICMESA manufacturing plant north of Milan, Italy, releasing a poisonous cloud of dioxin gas. Although dioxin is toxic—it was an ingredient in the herbicide Agent Orange used during the Vietnam War—evacuation efforts began slowly. Named for the small Italian town most affected, the Seveso disaster led to legislation aimed at preventing chemical accidents.
