Emission Intensity Index

The index is calculated by dividing total greenhouse gas emissions by a chosen business metric. Common denominators include:

• Revenue: grams of CO2e per dollar of revenue (gCO2e/$)
• Production volume: kilograms of CO2e per ton of steel produced
• Transport work: grams of CO2e per ton-mile or tonne-kilometer
• Floor area: kilograms of CO2e per square foot for real estate portfolios

The formula is: Emission Intensity = Total Scope 1 & 2 Emissions (tCO2e) / Normalization Factor

The primary purpose of this index is to measure absolute decoupling of emissions from growth. A declining intensity ratio signals that a company is becoming more carbon-efficient per unit of output.

• Relative decoupling: Emissions grow slower than the business metric
• Absolute decoupling: Emissions decline while the business metric grows
• No decoupling: Emissions grow at the same rate or faster than the business metric

This makes the index a critical tool for tracking progress toward science-based targets without penalizing business expansion.

The index must clearly define which emission scopes are included to avoid misleading comparisons:

• Scope 1 only: Direct emissions from owned or controlled sources, such as fleet fuel combustion
• Scope 1 + 2: Adds indirect emissions from purchased electricity, heat, and steam
• Scope 1 + 2 + 3: Incorporates value chain emissions, including upstream purchased goods and downstream product use

Including Scope 3 dramatically increases the numerator and is essential for sectors like logistics and manufacturing, where outsourced activities dominate the carbon footprint.

While useful for internal trend analysis, cross-company comparisons require caution due to methodological inconsistencies:

• Different normalization denominators (revenue vs. production volume) yield incomparable ratios
• Revenue-based intensities are distorted by currency fluctuations and pricing strategies
• Organizational boundary definitions (equity share vs. control approach) alter the numerator
• Product mix shifts can change intensity without actual efficiency improvements

Standardized frameworks like the GLEC Framework and ISO 14083 aim to harmonize logistics emission intensity calculations.

The Science Based Targets initiative (SBTi) accepts intensity-based targets under specific conditions:

• Physical intensity targets (e.g., tCO2e per ton of product) are preferred over economic intensity targets
• The target must lead to absolute emission reductions when the company grows within projected rates
• A companion absolute emissions pledge is often required to ensure the intensity improvement is not simply a function of denominator growth

Intensity targets are particularly relevant for high-growth sectors where absolute reductions are infeasible in the near term.

In logistics, the emission intensity index is expressed as grams of CO2e per ton-mile or kilograms of CO2e per pallet shipped. This enables:

• Comparing the carbon efficiency of different transport modes (air vs. ocean vs. rail)
• Evaluating carrier performance on a normalized basis
• Tracking the impact of modal shift and load consolidation initiatives
• Setting procurement criteria in a carbon-aware tender engine

A declining ton-mile intensity directly reflects the success of carbon-aware routing and fleet efficiency programs.

A comprehensive life-cycle analysis method that accounts for total energy consumption and greenhouse gas emissions from fuel production (well-to-tank) through to its combustion in a vehicle (tank-to-wheel) . An Emission Intensity Index using WTW data captures the true carbon cost of an energy source, not just tailpipe emissions.

• Critical for evaluating biofuels and e-fuels
• Prevents burden-shifting to upstream processes
• Required by the EU Renewable Energy Directive

An algorithm that calculates the most fuel-efficient path by integrating real-time traffic, topography, vehicle specifications, and emission factors. This engine generates the optimized activity data that directly improves the numerator of the Emission Intensity Index.

• Reduces grams of CO2e per ton-mile in real-time
• Considers road grade and congestion patterns
• Outputs feed directly into intensity dashboards

The computational process of quantifying indirect greenhouse gas emissions in a company's value chain. Since logistics emissions are typically Scope 3 Category 4 (Upstream Transportation) , the Emission Intensity Index is a primary KPI for managing and reducing this vast, outsourced footprint.

• Uses spend-based and activity-based methods
• Essential for Science-Based Target setting
• Models emissions from Tier 1 to Tier N suppliers

A procurement evaluation model that incorporates an internal carbon price into the traditional TCO calculation. This financially penalizes high-emission bids, making the Emission Intensity Index a direct driver of carrier selection and modal shift decisions.

• Formula: TCO + (tCO2e × Internal Carbon Price)
• Incentivizes low-carbon carrier innovation
• Shifts procurement from cost-only to value-based

A software component that automatically selects the most appropriate CO2e conversion factor from a managed database based on transport activity data—mode, fuel type, distance, and vehicle load. The accuracy of an Emission Intensity Index is entirely dependent on the precision of this matching logic.

• Replaces manual spreadsheet lookups
• Maintains an auditable factor lineage
• Supports dynamic factor updates from GLEC and EPA