What is the fine-grained topic of the following text: Synthetic fiber producer Invista has filed a lawsuit against DuPont in U.S. District Court in the Southern District of New York, claiming that the 14 plants it acquired from DuPont in 2004 didn't comply with safety and environmental laws. Only return the topic.
Invista's lawsuit against DuPont over non-compliance with safety and environmental laws in acquired plants.