{"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:fuel-evaporation-in-an-underground-garage","key":"fuel-evaporation-in-an-underground-garage","label":"Fuel evaporation in an underground garage","description":"In a large residential underground parking garage in Tianjin, volatile organic compounds averaged 362.7 μg/m³ against 63.2 μg/m³ outdoors and were positively correlated with traffic flow, especially in the daytime; tailpipe exhaust accounted for 43.2% and evaporative emissions of fuel vapour for 33.7% of them, and evaporation from the many parked cars for 69.3% at night.","scope":"One garage in China, with sources apportioned by a statistical model; it measures air composition, not odour.","evidenceClass":"scientific","canonicalUrl":"https://smellbook.com/evidence/claims/fuel-evaporation-in-an-underground-garage","attribution":"SmellBook (https://smellbook.com)"},"outgoing":[{"relation":"cites-source","label":"cites source","entity":"smellbook:source:vocs-in-an-underground-parking-garage-2023","entityLabel":"Evaluating vehicular exhaust and evaporative emissions via VOC measurement in an underground parking garage","record":"/data/graph/source/vocs-in-an-underground-parking-garage-2023.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-PARKING-001].sourceIds","evidenceClass":"editorial"}]},{"relation":"claim-about","label":"claim about","entity":"smellbook:smell:parking-garage","entityLabel":"Parking Garage","record":"/data/graph/smell/parking-garage.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-PARKING-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."}