Looking back to the early days of the Bayer plan, the main focus of controversy was on pollution and industrial safety. The anti-Bayer camp still believes that the proposed plant, which would make TDI, a liquid used in plastics manufacture, would cause pollution and are especially worried that the phosgene used in the production process could, if it leaked, cause major death and injury.
回顧拜耳來台，起初引起的爭議主要在汙染和工安問題，反拜耳陣營認為，拜耳預備來台設置的塑膠原料﹘﹘甲苯二異氰酸 (TDI) 和二苯甲烷二異氰酸 (MDI) 工廠，會造成環境汙染，尤其是生產過程中所需的光氣，若發生外洩，可能造成重大傷亡。