{"entity":{"iso2":null,"iso3":null,"name":"Leiden","slug":"leiden"},"indicator":{"licence":"OECD Terms and Conditions (attribution required)","slug":"air-pollution-cities-and-fuas-population-exposure-to-nitrogen-dioxide","source":"Organisation for Economic Co-operation and Development","source_url":"https://data-explorer.oecd.org/vis?df[ds]=dsDisseminateFinalDMZ&df[id]=DSD_FUA_ENV@DF_POLLUTION","title":"Air pollution - Cities and FUAs \u2014 Population exposure to nitrogen dioxide","unit":"Microgrammes per cubic metre"},"observations":[{"date":"2021-01-01","value":67.9902},{"date":"2022-01-01","value":66.2995},{"date":"2023-01-01","value":0.485752},{"date":"2024-01-01","value":61.5753},{"date":"2025-01-01","value":55.787}],"summary":{"latest_period":"2025-01-01","latest_value":55.787,"max":67.9902,"mean":50.4276,"min":0.485752,"of":1324,"rank":53,"trend":"volatile"}}