Retrieve real-time Air Quality Index (AQI) data for any city using the World Air Quality Index Project, providing freshness scores and source verification for environmental monitoring.
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China Air Quality MCP — nationwide hourly AQI from CNEMC (中国环境监测总站).
Free, keyless real-time air quality (US AQI plus PM2.5, PM10, ozone, NO2, SO2, CO) for any city.