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CAMS (Copernicus)Hourly air forecast, through Open-MeteoChecking…sensor.communityCitizen particle sensorsChecking…European Environment AgencyThe scale and the health adviceMinistry of Environment and WaterGreen phone for reportsNatural EarthBorders on the map
Air Shield is not an official source. Citizen sensors are low-cost and read high in fog; the forecast is a model. Every source has a copy saved within the last 6 hours; when we use it, we say so and how old it is.