{"entity":{"iso2":null,"iso3":null,"name":"Chicago","slug":"chicago"},"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":20.6009},{"date":"2022-01-01","value":19.4929},{"date":"2023-01-01","value":0.0479923},{"date":"2024-01-01","value":15.7193},{"date":"2025-01-01","value":21.221}],"summary":{"latest_period":"2025-01-01","latest_value":21.221,"max":21.221,"mean":15.4164,"min":0.0479923,"of":1324,"rank":791,"trend":"volatile"}}