1) The document describes an air quality monitoring system using a vehicle monitoring system (VMS) based on IoT technology.
2) The VMS contains sensors to measure air pollutants like PM2.5, NO2, CO, and O3, as well as GPS, temperature, and humidity. It transmits the sensor data to a cloud server via LoRa wireless technology.
3) Users and government agencies can access the aggregated data on air quality, location, and weather from the cloud to monitor pollution levels and make decisions on traffic planning and pollution reduction actions.