GHG Emissions Inventory Compiler
Compile defensible GHG emissions inventories across Scope 1, 2, and 3 using GHG Protocol standards
What You Can Do
You can architect complete emissions inventories that meet GHG Protocol Corporate Standard requirements across Scope 1 (direct), Scope 2 (purchased energy), and Scope 3 (value chain) sources. This skill guides you through data collection workflows, emission factor selection, calculation execution, and verification processes—transforming raw operational data into defensible carbon accounting that withstands third-party audits, Science Based Target validation, and CDP disclosure scrutiny.
Features
Map organizational sources to GHG Protocol categories and design data request templates for business units and facilities
Apply appropriate calculation factors (IPCC, EPA, IVL, regional databases) aligned with source type and data quality level
Systematically calculate emissions using location-based, market-based, or hybrid methodologies for each scope
Set credible baseline years and track year-over-year emissions performance with consistent methodologies
Identify gaps, assumptions, and uncertainty ranges that impact inventory credibility and verification readiness
Organize inventory documentation, source data trails, and calculation workpapers for third-party auditor review
Guide conversions between calculation approaches (e.g., location-based to market-based electricity accounting) with impact analysis
Example Output
Example 1: Scope 2 Electricity Emissions Calculation
- Source: 250,000 kWh purchased from regional grid
- Location-based factor: 0.385 kg CO₂e/kWh (US Southeast grid)
- Calculation: 250,000 kWh × 0.385 = 96,250 kg CO₂e (96.25 mtCO₂e)
- Market-based factor: 0.275 kg CO₂e/kWh (renewable energy certificates)
- Market-based result: 68,750 kg CO₂e (68.75 mtCO₂e)
- Documentation: Utility invoice reference, factor source (EPA), RECs purchased
Example 2: Scope 3 Business Travel Emissions
- 45,000 miles of business flights (average 500 miles per trip)
- Emission factor: 0.175 kg CO₂e per mile (short-haul domestic)
- Calculation: 45,000 miles × 0.175 = 7,875 kg CO₂e (7.88 mtCO₂e)
- Data quality issue identified: Radiative forcing index not applied; actual climate impact ~2.7x higher
- Recommendation: Apply RFI multiplier (3.0) for interim reporting = 23.6 mtCO₂e
Example 3: Baseline Year Verification
- 2021 baseline total: 8,420 mtCO₂e
- 2024 inventory total: 7,890 mtCO₂e
- Year-over-year reduction: 6.3%
- Methodology changes documented: Market-based electricity adoption (Scope 2 reduction of 420 mtCO₂e)
- Real operational reductions: 90 mtCO₂e (activity and efficiency improvements)
- Verification-ready documentation package prepared
What's Included
- SKILL.md instruction file: Complete GHG Protocol inventory compilation framework with scope definitions and methodology guidance
- Data Collection Template: Source category mapping, business unit data request forms, and facility-level emissions worksheets
- Emission Factor Database Reference: Curated factor selection guide by source type (electricity, natural gas, transportation, waste) with regional and methodological variations
- Calculation Workbook Structure: Scope 1, 2, 3 calculation templates with formula architecture and assumption tracking
- Inventory Verification Checklist: Data quality assessment, documentation requirements, and third-party audit readiness criteria
- Baseline Year Documentation: Methodology lock-in worksheet and year-over-year reconciliation framework
Who It's For
- Carbon accountants and sustainability analysts building organizational emissions inventories
- Climate action officers preparing Science Based Target submissions and climate strategy documentation
- Corporate sustainability teams managing CDP, GRI, and CSRD climate disclosures
- Environmental consultants supporting client emissions accounting and verification processes
- Facilities and operations managers compiling Scope 1 and 2 emissions from building systems and energy procurement
Best For
- Annual organizational emissions inventory compilation and update cycles
- Baseline year establishment and emissions reduction target setting
- Multi-facility or multi-business unit emissions consolidation and data standardization
- Transition between emissions calculation methodologies (location-based to market-based conversion)
- Data quality remediation and inventory verification preparation for third-party audits
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