Polychlorinated dibenzodioxins (PCDDs), or simply dioxins, are a group of long-lived polyhalogenated organic compounds that are primarily anthropogenic, and contribute toxic, persistent organic pollution in the environment.

Love Canal is a neighborhood in Niagara Falls, New York, United States, infamous as the location of a 0.28 km2 (0.11 sq mi) landfill that became the site of an environmental disaster discovered in 1977. Decades of dumping toxic chemicals killed residents and harmed the health of hundreds, often profoundly. The area was cleaned up over the course of 21 years in a Superfund operation.