100% agree. It is super important to know the composition of the particles. Unfortunately currently only super expensive instruments can measure this in real-t

100% agree. It is super important to know the composition of the particles. Unfortunately currently only super expensive instruments can measure this in real-time. This is why I believe contextual information will become much more important in future. Detect an indoor short PM2.5 spike around lunch time, probably a cooking event. Detect medium elevated levels outdoor in a city in the morning and late afternoons, probably traffic related smoke. I actually made a small tool to simulate different events that contain a quiz. Give it a try here [1]. [1] https://www.airgradient.com/air-quality-monitoring-toolkit/planning/defining-the-project/#interactive-aq-simulator https://www.airgradient.com/air-quality-monitoring-toolkit/p...