What advantages and disadvantages do you see to federal versus state and local regulation and management of waste streams?

Environment and You, 2e, Christensen and Leege, submit your answers that address the following 3 areas. The post MUST be well organized essay format.
1. Municipal Solid Waste: How has U.S. legislation regulating the generation, disposal, and cleanup of hazardous waste changed over past 50 years?
2. Hazardous Waste Management: How is financial responsibility for hazardous waste disposal assigned under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)?
3. What advantages and disadvantages do you see to federal versus state and local regulation and management of waste streams?