{
  "definition": {
    "EAF": {
      "emissionGroups": [
        1
      ],
      "denominator": "same-year EAF crude-steel production, Mt/year"
    },
    "Integrated BF-BOF": {
      "emissionGroups": [
        0,
        2,
        3,
        4,
        5,
        6
      ],
      "denominator": "same-year BOF crude-steel production, Mt/year"
    }
  },
  "groupOrder": [
    "BOF",
    "EAF",
    "Sintering",
    "Blast furnace",
    "Stockpiles and diffuse",
    "Other integrated processes",
    "Flaring"
  ],
  "emissionUnit": "kt/year",
  "intensityUnit": "kg PM/t steel",
  "unitIdentity": "1 kt/Mt = 1 kg/t",
  "manuscriptEvidence": {
    "document": "User-supplied Particulate Matter Emissions from the UK Iron and Steel Industry, audited October 2026 version",
    "textSha256": "0a181e7ce303182df84b59949e89ce3b0236f9862710aeb7b95de00aecacb93d",
    "locations": [
      "Methods, supplementary analysis of production routes (paragraphs 73–74 in audit extraction)",
      "Figure 10 note (paragraph 169 in audit extraction)"
    ]
  },
  "workbookEvidence": {
    "document": "User-supplied Figures.xlsx",
    "sha256": "45f03543159eb3020dfba07859f1ef5573bdd8ac7d34206f15a5fe6c9cf4eb5f",
    "sheet": "Fig.10",
    "PM25": "A1:J47",
    "PM10": "A53:J99"
  },
  "verification": "44 national annual rows, 1981-2024. Historical 1981-1989 reproduce Figure 7/8 source emissions and all seven Figure 10 route quantities for both fractions. Earlier full-paper Figure 10 audit remains valid on its identical original inputs.",
  "currentInputs": "1981-1989 use the validated paper workbook snapshot. All current official 1990-2024 inputs remain unchanged. The 1990 workbook overlap is documented in official-audit.json, not appended or substituted.",
  "zeroOrMissingProduction": "Intensity is unavailable, not zero or infinite.",
  "nationalDenominator": "Reported national crude-steel production. Route-weighted intensity uses BOF+EAF production, which may differ from the national figure due to source precision or rounding. Both are disclosed without rescaling.",
  "boundary": "Reconstructed seven-group NFR 2.C.1 study boundary, not point-source totals, combustion or lifecycle emissions."
}