This course uses a case-study approach to discuss current and historic controversies in environmental and occupational health policy making. Our specific focus is on the examination of how scientific information (e.g., risk assessments, exposure analyses, epidemiologic studies, clinical case reports,) is used (or is not used) in policy decisions. Students will learn how environmental health laws and regulations are made and challenged, and gain experience looking up laws, regulations and court decisions and will submit comments to timely rules in the public docket. Case studies feature international treaties, federal and state court cases, laws, regulations, and policies. Topic areas include air and water quality (including PFAS and microplastics), hazardous waste, environmental justice, worker safety, and climate change.