This lecture covers the legal frameworks governing land use and environmental protection in Switzerland. It discusses the principles of limiting emissions and protecting against nuisances such as noise and pollution. The instructor explains the legal obligations for emission control, including preventive measures and stricter limitations when nuisances are anticipated. The lecture also addresses the importance of the Swiss Constitution and various laws, such as the Federal Act on the Protection of the Environment (LPE), in regulating land use and environmental impacts. Additionally, it highlights the role of federal and cantonal authorities in enforcing these laws and the significance of public interest in land use decisions. The lecture includes case studies illustrating the application of these legal principles in real-world scenarios, emphasizing the balance between individual property rights and collective environmental responsibilities.