Fifty recently filed lawsuits allege Monsanto and related companies are responsible for causing cancer.
Each of the complaints say Monsanto and its successor companies caused cancer by exposing the plaintiffs to dioxins and furans. The cases mention the "negligent and otherwise unlawful release of dioxin from defendants' waste disposal practices".
Monsanto owned and operated the plant in question from 1934 to 2000. From 1949 to 1970, the company produced an herbicide that was heavily contaminated with dibenzo dioxins and dibenzo furans. The complaints say the company disposed of the dioxin-contaminated waste in a way which caused dioxins to escape into the air.