The Haller System is a method used to classify and assess the quality of air in urban environments. It focuses on various factors, including pollution levels, green spaces, and the overall health of the ecosystem. This system helps city planners and environmentalists understand how urban design impacts air quality and public health. By utilizing the Haller System, cities can identify areas that require improvement and implement strategies to enhance air quality. This may involve increasing vegetation, reducing emissions from vehicles, and promoting sustainable practices. Ultimately, the goal is to create healthier living conditions for residents while preserving the environment.