NRS stands for the National Response System, which is a framework used in the United States to manage responses to oil spills and hazardous substance releases. It involves various federal, state, and local agencies working together to ensure effective and coordinated action during environmental emergencies. The system aims to minimize the impact of such incidents on public health and the environment. The NRS is guided by the Oil Pollution Act and the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). These laws establish protocols for preparedness, response, and recovery efforts, ensuring that resources are available and that trained personnel are ready to act when needed.