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SmellBook Public Atlas. smellbook:smell:subway-metro. https://smellbook.com/smells/subway-metro","bibtex":"@misc{smellbook_subway_metro_r5,\n  author = {{SmellBook}},\n  title = {Subway / Metro},\n  year = {2026},\n  note = {SmellBook Public Atlas, revision 5, 2026-10-06, smellbook:smell:subway-metro},\n  url = {https://smellbook.com/smells/subway-metro}\n}","ris":"TY  - ENCYC\nID  - smellbook-subway-metro-r5\nTI  - Subway / Metro\nAU  - SmellBook\nT2  - SmellBook Public Atlas\nPY  - 2026\nDA  - 2026/10/06\nET  - revision 5\nUR  - https://smellbook.com/smells/subway-metro\nN1  - SB-0050; smellbook:smell:subway-metro; resolver https://smellbook.com/id/smell/subway-metro\nER  - "},"dataset":{"release":"2026-11-11","export":"https://smellbook.com/data/graph-export.json","sha256":"6e1112d672ccd0f7b5a892a2dde1dbb45f737814a338891970d3a4e25ba72e18","releases":"https://smellbook.com/dataset-releases"},"evidence":[{"evidenceClass":"scientific","label":"Scientific evidence","claims":[{"id":"CLM-COMMUTE-001","urn":"smellbook:claim:solvent-compounds-in-bus-and-metro-interiors","resolver":"https://smellbook.com/id/claim/solvent-compounds-in-bus-and-metro-interiors","title":"Solvent compounds in bus and metro interiors","text":"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.","supportCheck":{"method":"phrase-in-abstract","description":"The statement the claim rests on was found word for word in the abstract fetched from the named service, and an editor read the full abstract against every part of the claim."},"sources":[{"id":"SRC-COMMUTE-2003","urn":"smellbook:source:aromatic-vocs-in-hong-kong-transport-2003","resolver":"https://smellbook.com/id/source/aromatic-vocs-in-hong-kong-transport-2003","kind":"PRIMARY RESEARCH","title":"Commuter exposure to aromatic VOCs in public transportation modes in Hong Kong","authors":"Wai-Lun Lau & Lo-Yin Chan","publisher":"Science of The Total Environment","date":"2003-06","doi":"10.1016/s0048-9697(02)00647-2","url":"https://doi.org/10.1016/s0048-9697(02)00647-2","passages":[],"citationCheck":{"method":"crossref","checkedOn":"2026-10-05","dateConfirmedTo":"month"}}]}]},{"evidenceClass":"historical","label":"Historical evidence","claims":[{"id":"CLM-UNDERGROUND-001","urn":"smellbook:claim:no-smell-of-damp-on-the-first-underground","resolver":"https://smellbook.com/id/claim/no-smell-of-damp-on-the-first-underground","title":"No smell of damp on the first Underground","text":"Describing the first journey along the whole of London's not yet finished Metropolitan Railway, made by invited guests in August 1862, James Hain Friswell wrote that Gower Street station had no smell of damp or confined air and that the air stayed dry and pleasant on that hot day.","scope":"One writer's impression of a new line on a single summer journey before it opened; it does not describe the line in regular service.","supportCheck":{"method":"passage-in-page-text","description":"The statement the claim rests on was found word for word in the text of the cited page or chapter of the digitised source, fetched from the named service, and an editor read that whole text against every part of the claim. 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