Greenhouse gas (GHG) inventories — systematic accounting of emissions across operations and supply chain — provide the foundational data for credible climate programs. Without accurate GHG inventory, climate claims, targets, and reduction efforts lack the data foundation that supports verification, comparison, and meaningful improvement. For B2B foodservice operations developing comprehensive climate programs, GHG inventory development is the essential first step that enables all subsequent climate program activity.
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This guide is the working B2B reference on GHG inventory development from a foodservice perspective.
What GHG Inventory Provides
GHG inventory provides:
Emissions baseline. Total operational emissions documented.
Source breakdown. Emissions by source category.
Year-over-year tracking. Changes over time.
Target-setting foundation. Data supporting target development.
Reporting foundation. Data for various sustainability frameworks.
Improvement tracking. Verification of reduction efforts.
For B2B foodservice operations, GHG inventory establishes the data foundation supporting all climate program activity.
The Scope Framework
GHG Protocol’s Scope 1, 2, 3 framework structures GHG inventory:
Scope 1: Direct Emissions
Owned/controlled sources.
Natural gas combustion for cooking equipment, water heating.
Refrigerant leakage from refrigeration systems.
Vehicle fleet emissions.
On-site generators or combustion equipment.
For most foodservice operations, Scope 1 is moderate portion of total.
Scope 2: Purchased Energy
Purchased electricity emissions.
Purchased heat or steam emissions.
Purchased cooling emissions.
For most foodservice operations, electricity-related emissions dominate Scope 2.
Scope 3: Indirect Value Chain Emissions
Category 1: Purchased goods and services.
Category 2: Capital goods.
Category 3: Fuel and energy not in Scopes 1 and 2.
Category 4: Upstream transportation.
Category 5: Waste.
Category 6: Business travel.
Category 7: Employee commuting.
Category 8: Upstream leased assets.
Category 9: Downstream transportation.
Category 10: Processing of sold products.
Category 11: Use of sold products.
Category 12: End-of-life of sold products.
Category 13: Downstream leased assets.
Category 14: Franchises.
Category 15: Investments.
For most foodservice operations, Scope 3 represents 80-90% of total emissions, dominated by Category 1 (purchased goods and services — particularly food).
GHG Inventory Process
Typical inventory development:
Stage 1: Boundary Definition
Organizational boundary. What entities are included.
Operational boundary. Which Scopes covered.
Reporting period definition.
Materiality consideration for inclusion thresholds.
Stage 2: Data Collection
Activity data collection for each emission source.
Emission factor selection for converting activity to emissions.
Data quality documentation.
Reporting period coverage.
Stage 3: Calculation
Emissions calculation using activity data and emission factors.
Conversion to standard units (CO₂e).
Aggregation by Scope and category.
Stage 4: Verification
Internal review for data quality.
External verification where applicable.
Documentation supporting numbers.
Stage 5: Reporting
Reporting format based on framework (GHG Protocol, etc.).
Disclosure to stakeholders.
Year-over-year comparison.
Typical Restaurant Emissions Profile
For typical restaurant operation:
Scope 1 (5-15% of total): Natural gas for cooking and heating, refrigerant leakage, fleet emissions.
Scope 2 (5-15% of total): Electricity-related emissions.
Scope 3 (70-90% of total): Dominantly Category 1 procurement (food, packaging, supplies).
Within Scope 3, Category 1 (50-70% of total): Food procurement dominant; packaging procurement substantial; other supplies.
For climate program impact, Scope 3 (especially food procurement) typically offers largest reduction opportunity.
How Compostable Packaging Fits GHG Inventory
For B2B foodservice operations:
Scope 3 Category 1 Element
Compostable packaging procurement appears in Scope 3 Category 1:
Lifecycle emissions of compostable packaging.
Comparison to conventional alternatives.
Year-over-year tracking of packaging-related emissions.
Lower Lifecycle Emissions
Compostable packaging typically has lower lifecycle emissions than conventional alternatives:
Bio-based feedstock captures atmospheric carbon during plant growth.
End-of-life through composting has lower emissions than landfill.
Manufacturing emissions vary but often comparable.
Documentation Requirements
For credible Scope 3 reporting:
Per-SKU lifecycle data from suppliers.
Year-over-year procurement tracking.
LCA documentation supporting reduction claims.
GHG Inventory Tools and Methodologies
Various tools support GHG inventory:
GHG Protocol resources including calculation tools.
Industry-specific calculators for foodservice.
Specialized software platforms for larger operations.
External consulting for comprehensive inventory development.
For different operation scales, different tools are appropriate.
Common GHG Inventory Implementation Mistakes
Several patterns affect GHG inventory:
Boundary inconsistency. Unclear or shifting boundaries between years.
Data quality variability. Mixing high-quality and estimated data without documentation.
Scope 3 omission. Focusing only on Scopes 1 and 2 misses majority of emissions.
Inconsistent emission factors. Using different factors for similar activities.
Lack of verification. Self-reported without verification.
Single-year focus. Year-over-year tracking essential for meaningful improvement.
What “Done” Looks Like for GHG Inventory
A B2B foodservice operation with mature GHG inventory:
- Defined organizational and operational boundaries
- Comprehensive data collection across Scope 1, 2, 3
- Standard methodology (typically GHG Protocol)
- Annual inventory updates
- Verified data for credibility
- Compostable packaging procurement integrated as Scope 3 element
- Year-over-year tracking demonstrating improvement
- Customer-facing communication aligned to actual data
The GHG inventory framework provides foundational data structure for climate programs. Operations that build mature inventory practices support all subsequent climate activity (target-setting, reduction implementation, reporting).
The supply chain across compostable food containers, compostable bowls, compostable cups and straws, compostable bags, and compostable cutlery and utensils supports Scope 3 packaging-related emissions tracked through GHG inventory. Compostable packaging procurement integrates with broader inventory practice supporting comprehensive climate program development.
For B2B operators evaluating climate program development, GHG inventory is the essential foundation. Define boundaries, collect data, apply methodology, integrate compostable packaging procurement, track year-over-year, and the GHG inventory practice provides the substantive data foundation supporting comprehensive climate commitments and credible stakeholder communication.
Background on the underlying standards: ASTM D6400 defines the U.S. industrial-compost performance bar, EN 13432 harmonises the EU equivalent, and the FTC Green Guides govern how “compostable” can be marketed on packaging in the United States.