{"entity":{"iso2":null,"iso3":null,"name":"Sofia","slug":"sofia"},"indicator":{"licence":"CC BY 4.0 (Eurostat)","slug":"nitrogen-dioxide-concentrations-in-european-capital-cities-monthly-averages-experimental","source":"Eurostat","source_url":"https://ec.europa.eu/eurostat/databrowser/view/env_air_no2","title":"Nitrogen dioxide concentrations in European capital cities - monthly averages, experimental statistics","unit":"Micrograms per cubic metre"},"observations":[{"date":"2018-01-01","value":35.8},{"date":"2019-01-01","value":46.1},{"date":"2020-01-01","value":32.7},{"date":"2021-01-01","value":29.5},{"date":"2022-01-01","value":35.0},{"date":"2023-01-01","value":31.0},{"date":"2024-01-01","value":28.5},{"date":"2025-01-01","value":34.0},{"date":"2026-01-01","value":17.0}],"summary":{"latest_period":"2026-01-01","latest_value":17.0,"max":46.1,"mean":32.1778,"min":17.0,"of":30,"rank":6,"trend":"falling"}}