{"entity":{"iso2":null,"iso3":null,"name":"Porto","slug":"porto"},"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":64.331},{"date":"2022-01-01","value":60.1625},{"date":"2023-01-01","value":0.416326},{"date":"2024-01-01","value":40.5148},{"date":"2025-01-01","value":46.3023}],"summary":{"latest_period":"2025-01-01","latest_value":46.3023,"max":64.331,"mean":42.3454,"min":0.416326,"of":1324,"rank":209,"trend":"volatile"}}