{"schemaVersion":"1.0","generatedAt":"2026-09-22","licence":{"status":"not-yet-granted","spdx":null,"statement":"No licence has yet been granted for SmellBook-created datasets. They are publicly readable; reuse beyond citation and quotation needs permission until a licence is published."},"node":{"entityType":"claim","urn":"smellbook:claim:air-freshener-and-off-gassing-inside-taxis","key":"air-freshener-and-off-gassing-inside-taxis","label":"Air freshener and off-gassing inside taxis","description":"Inside 14 pairs of Barcelona taxis, the volatile organic compounds reflected a complex mixture of traffic-related emissions entering the cabin, but those from inside the cabin included high monoterpene concentrations from an air freshener, and interior off-gassing may explain why the youngest taxi had the highest levels of alkanes and aromatic compounds (a chemical family, not a description of smell).","scope":"Taxis in one city on weekdays, mostly driven with windows open; it measures air composition, not odour.","evidenceClass":"scientific","canonicalUrl":"https://smellbook.com/evidence/claims/air-freshener-and-off-gassing-inside-taxis","attribution":"SmellBook (https://smellbook.com)"},"outgoing":[{"relation":"cites-source","label":"cites source","entity":"smellbook:source:air-inside-taxis-2019","entityLabel":"Vehicle interior air quality conditions when travelling by taxi","record":"/data/graph/source/air-inside-taxis-2019.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-TAXI-001].sourceIds","evidenceClass":"editorial"}]},{"relation":"claim-about","label":"claim about","entity":"smellbook:smell:taxi-interior","entityLabel":"Taxi Interior","record":"/data/graph/smell/taxi-interior.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-TAXI-001].smellSlugs","evidenceClass":"editorial"}]}],"incoming":[],"corrections":[],"citation":null,"boundary":"Edges are typed and unweighted; none is a similarity, recommendation or personalization score. Browser-local Personal SmellBook data is never part of this export."}