GHG Inventory Calculation & Analysis
Calculate and verify organizational GHG emissions across Scope 1, 2, and 3
What You Can Do
You can process complex emissions datasets, cross-reference emission factors, reconcile discrepancies across reporting periods, and flag calculation errors with transparency. Claude assists you in calculating Scope 1 (direct), Scope 2 (purchased energy), and Scope 3 (value chain) emissions while preparing audit-ready documentation that meets regulatory compliance standards like SBTi and CDP requirements.
Features
systematically compute Scope 1, 2, and 3 emissions using standardized GHG Protocol methodologies
flag missing activity data, unreliable inputs, and quality issues across business units
analyze year-over-year changes, normalize for organizational growth, and identify drivers of increases/decreases
generate transparent, audit-ready reports explaining calculation methods, emission factors, and assumptions
compare Scope 2 calculations under different electricity attribution approaches
cross-check carbon accounting software outputs for accuracy and completeness
reconcile current emissions against baseline years and monitor progress toward reduction goals
identify discrepancies between source data and reported figures with root cause analysis
Example Output
Example 1: Scope 2 Emissions Reconciliation
- Activity Data: 5,000 MWh purchased electricity (US grid average)
- Emission Factor: 0.385 kg CO₂e/kWh (EPA eGrid 2023)
- Calculated Emissions: 1,925 metric tons CO₂e
- Verification Note: Data quality flag—supplier-specific factors available for 60% of grid regions; recommend market-based approach for 40% with unavailable data
Example 2: Scope 3 Emissions Audit
- Category: Business travel (flights)
- Activity: 250,000 passenger miles
- Emission Factor: 0.255 kg CO₂e per mile (DEFRA 2023)
- Calculated Emissions: 63.75 metric tons CO₂e
- Reconciliation: +15% vs. prior year (flagged for review; recommend cross-checking booking system data)
Example 3: Inventory Summary
✓ Total Scope 1: 2,340 metric tons CO₂e ✓ Total Scope 2 (location-based): 1,925 metric tons CO₂e ✓ Total Scope 3: 18,450 metric tons CO₂e ✓ Total Organizational Emissions: 22,715 metric tons CO₂e ⚠ Data completeness: 94% (6% estimated due to late submissions)
What's Included
- SKILL.md instruction file with full GHG Protocol methodology guidance:
- GHG Emissions Calculation Template: structured worksheet for Scope 1, 2, and 3 activity data and emission factors
- Data Validation Checklist: quality assurance framework for identifying gaps and inconsistencies
- Reconciliation Worksheet: year-over-year comparison and driver analysis template
- Audit-Ready Documentation Framework: methodology narrative, assumption log, and uncertainty analysis template
Who It's For
- Sustainability managers — preparing annual organizational carbon inventories and managing data from multiple facilities
- ESG/CSR professionals — compiling emissions data for CDP, SBTi, or regulatory submissions
- Environmental consultants — verifying client emissions calculations and identifying data quality issues
- Corporate climate analysts — tracking progress toward net-zero or emissions reduction targets
- Facilities and operations managers — documenting Scope 1 and 2 emissions from buildings and equipment
Best For
- Annual GHG inventory calculations and compilation across organizational scopes
- Third-party carbon accounting software output verification and validation
- Year-over-year emissions reconciliation and trend analysis
- Data quality assessments and identification of missing or unreliable activity data
- Audit-ready documentation preparation for external assurance or regulatory submissions
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