{"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:solvent-compounds-in-bus-and-metro-interiors","key":"solvent-compounds-in-bus-and-metro-interiors","label":"Solvent compounds in bus and metro interiors","description":"Among nine Hong Kong public transport modes, toluene, ethylbenzene and xylene levels were substantially higher in air-conditioned buses and Mass Transit Railway trains than in the others, which the authors take to suggest additional solvent-related sources in those vehicle interiors.","scope":"Five winter months of 2001–02; it measures air composition, not odour, and the levels were within Hong Kong's health-protecting limits.","evidenceClass":"scientific","canonicalUrl":"https://smellbook.com/evidence/claims/solvent-compounds-in-bus-and-metro-interiors","attribution":"SmellBook (https://smellbook.com)"},"outgoing":[{"relation":"cites-source","label":"cites source","entity":"smellbook:source:aromatic-vocs-in-hong-kong-transport-2003","entityLabel":"Commuter exposure to aromatic VOCs in public transportation modes in Hong Kong","record":"/data/graph/source/aromatic-vocs-in-hong-kong-transport-2003.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-COMMUTE-001].sourceIds","evidenceClass":"editorial"}]},{"relation":"claim-about","label":"claim about","entity":"smellbook:smell:bus-interior","entityLabel":"Bus Interior","record":"/data/graph/smell/bus-interior.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-COMMUTE-001].smellSlugs","evidenceClass":"editorial"}]},{"relation":"claim-about","label":"claim about","entity":"smellbook:smell:subway-metro","entityLabel":"Subway / Metro","record":"/data/graph/smell/subway-metro.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-COMMUTE-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."}