What you're seeing

Each ball is a pollutant measured in Seoulright now. The more balls of a colour, the more of that pollutant is in the air — normalised against the World Health Organization's safe limits, so a hazy city looks unmistakably denser than a clean one. Data is live from Open-Meteo / CAMS. How Polly works →

Want your own city and a hay-fever pollen view? Open the live map, or track your symptoms against the air.