WHO世界卫生组织：2026年空气质量指数：最佳实践的关键考虑因素和路线图（英文版）

ir quality indexes (AQIs) are widely used to communicate short-term air pollution concentrations and related health risks to the public. Conventional AQIs are typically formulated based on the concentration of the single air pollutant that most exceeds its regulatory standard (among all pollutants measured). Alternatively, health-based AQIs represent the combined health risks due to multiple air pollutants and are formulated from concentration–response functions derived from epidemiological e