{
  "om": {
    "category": "grid_electricity",
    "subcategory": "national_grid_operating_margin",
    "description": "West African Power Pool (WAPP) grid operating margin CO2 emission factor, applicable to Nigeria as a WAPP member country",
    "value": 0.578,
    "unit": "kgCO2e_per_kWh",
    "gas": {
      "CO2": 0.578,
      "CH4": 0,
      "N2O": 0
    },
    "gwp_basis": "AR6",
    "scope": 2,
    "data_year": 2019,
    "published_year": 2021,
    "country": "NG",
    "region": "WAPP",
    "source": {
      "id": "WAPP_ASB0034_2021",
      "title": "Standardized Baseline for WAPP including Nigeria (ASB0034-2021)",
      "publisher": "UNFCCC / WAPP",
      "year": 2021,
      "page": "Section 7, Table 1"
    },
    "additional_sources": [
      {
        "id": "WAPP_ASB0034_ASSESSMENT",
        "title": "Assessment Report ASU006 ASB0034 WAPP",
        "publisher": "UNFCCC / WAPP",
        "year": 2021,
        "page": "Section B, Step 4"
      },
      {
        "id": "UNFCCC_CDM_TOOL07",
        "title": "UNFCCC CDM Methodological Tool 07 v7.0",
        "publisher": "UNFCCC",
        "year": 2021,
        "page": "Section 6.4.1, Simple OM"
      }
    ],
    "confidence": "high",
    "methodology_note": "Operating margin extracted directly from ASB0034-2021 Table 1 as 0.578 tCO2/MWh. Unit conversion to kgCO2e/kWh is 1:1 because 1 tCO2/MWh equals 1 kgCO2/kWh. The OM is a 2017-2019 generation-weighted average using the simple operating margin method; low-cost/must-run generation was below 50% of total generation.",
    "nefdb_version": "1.0.0"
  },
  "bm": {
    "category": "grid_electricity",
    "subcategory": "national_grid_build_margin",
    "description": "West African Power Pool (WAPP) grid build margin CO2 emission factor, applicable to Nigeria as a WAPP member country",
    "value": 0.556,
    "unit": "kgCO2e_per_kWh",
    "gas": {
      "CO2": 0.556,
      "CH4": 0,
      "N2O": 0
    },
    "gwp_basis": "AR6",
    "scope": 2,
    "data_year": 2019,
    "published_year": 2021,
    "country": "NG",
    "region": "WAPP",
    "source": {
      "id": "WAPP_ASB0034_2021",
      "title": "Standardized Baseline for WAPP including Nigeria (ASB0034-2021)",
      "publisher": "UNFCCC / WAPP",
      "year": 2021,
      "page": "Section 7, Table 1"
    },
    "additional_sources": [
      {
        "id": "WAPP_ASB0034_ASSESSMENT",
        "title": "Assessment Report ASU006 ASB0034 WAPP",
        "publisher": "UNFCCC / WAPP",
        "year": 2021,
        "page": "Section B, Step 5"
      },
      {
        "id": "UNFCCC_CDM_TOOL07",
        "title": "UNFCCC CDM Methodological Tool 07 v7.0",
        "publisher": "UNFCCC",
        "year": 2021,
        "page": "Section 6.5, Step 5 / Equation 15"
      }
    ],
    "confidence": "high",
    "methodology_note": "Build margin extracted directly from ASB0034-2021 Table 1 as 0.556 tCO2/MWh. Unit conversion to kgCO2e/kWh is 1:1. The BM represents the most-recent dispatchable capacity additions (2015-2019) comprising the 20% generation sample set, using 2019 generation data.",
    "nefdb_version": "1.0.0"
  },
  "cm": {
    "category": "grid_electricity",
    "subcategory": "national_grid_combined_margin",
    "description": "West African Power Pool (WAPP) grid combined margin CO2 emission factor for wind and solar power generation project activities, first crediting period",
    "value": 0.573,
    "unit": "kgCO2e_per_kWh",
    "gas": {
      "CO2": 0.573,
      "CH4": 0,
      "N2O": 0
    },
    "gwp_basis": "AR6",
    "scope": 2,
    "data_year": 2019,
    "published_year": 2021,
    "country": "NG",
    "region": "WAPP",
    "source": {
      "id": "WAPP_ASB0034_2021",
      "title": "Standardized Baseline for WAPP including Nigeria (ASB0034-2021)",
      "publisher": "UNFCCC / WAPP",
      "year": 2021,
      "page": "Section 7, Table 1 (wind and solar row)"
    },
    "additional_sources": [
      {
        "id": "WAPP_ASB0034_ASSESSMENT",
        "title": "Assessment Report ASU006 ASB0034 WAPP",
        "publisher": "UNFCCC / WAPP",
        "year": 2021,
        "page": "Section B, Step 6"
      },
      {
        "id": "UNFCCC_CDM_TOOL07",
        "title": "UNFCCC CDM Methodological Tool 07 v7.0",
        "publisher": "UNFCCC",
        "year": 2021,
        "page": "Section 6.6.1, Equation 16"
      }
    ],
    "confidence": "high",
    "methodology_note": "Combined margin extracted from ASB0034-2021 Table 1 as 0.573 tCO2/MWh for wind/solar project activities. Cross-check with TOOL07: CM = OM × 0.75 + BM × 0.25 = 0.578 × 0.75 + 0.556 × 0.25 = 0.5725, rounded to 0.573 tCO2/MWh. The general/other-projects first-crediting-period value is 0.567 tCO2/MWh (50/50 weights). Unit conversion to kgCO2e/kWh is 1:1.",
    "nefdb_version": "1.0.0"
  }
}