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 "description": "Append-only Evidence Passport records. Old revisions are immutable; corrections create a new revision and preserve the previous permalink.",
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  "title": "BLUME Air-Quality Monitoring Network",
  "canonicalUrl": "https://1001smartcities.org/projects/berlin-blume-air-quality/"
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   "createdAt": "2026-10-05T22:28:58Z",
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   "summary": "Created the first structured Evidence Passport with 12 claims and 7 source dossiers.",
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     "summary": "Added claim-level evidence mapping and source dossiers."
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      "text": "has tracked pollutants since 1975",
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      "supportNote": "'Die Luftverunreinigung Berlins wird seit 1975 durch das Berliner Luftgüte-Messnetz BLUME kontinuierlich gemessen.' The Environmental Atlas adds that monitoring started in the western half of the city.",
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      "text": "Stations report to the central hub every five minutes",
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      "text": "feeding an hourly air-quality index and real-time public data on luftdaten.berlin.de",
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      "text": "complemented by passive samplers",
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      "text": "The measurements underpin the city's clean-air plan (Luftreinhalteplan) and its low-emission zone",
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      "text": "used BLUME's routine readings to show traffic-related soot at the measuring stations falling 33% against 2009 and 52% against 2007",
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      "text": "estimated that annual PM10 would have been about 7% higher in 2010 without the zone",
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       "value": "The Senate's own evaluation of stage 2 of the low-emission zone (editorial close June 2011): routine air-quality data show traffic-related soot down 33% on 2009 and 52% on 2007; PM10 estimated about 7% higher in 2010 without the zone.",
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       "type": "descriptive-source-note",
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     "claimsMapped": 12,
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     "sourcesUsedByClaims": 7,
     "sourcesWithPublicationDate": 1,
     "sourcesWithArchive": 0,
     "sourcesWithExactLocator": 0,
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    },
    "limits": [
     "Publisher names and source languages have not yet been classified; domains are recorded without guessing.",
     "Existing source notes are descriptive locators, not page- or paragraph-exact citations.",
     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
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 ]
}