The EPA estimates freight transport accounts for 29% of CO2 emissions in the United States, and experts project that freight emissions will surpass passenger transportation emissions globally by 2050. Retail supply chains sit inside that number. The combined emissions from retail operations and supply chains account for nearly half of greenhouse gas emissions globally, according to McKinsey.
For most retailers, this isn’t a future problem to plan for. It’s a present cost that’s already showing up in regulatory requirements, investor scrutiny, and supply chain exposure.
Where the Emissions Actually Come From
Retail transportation emissions are distributed across three phases: inbound logistics (goods moving from manufacturers to distribution centers), last-mile delivery (goods moving from distribution centers to stores or customers), and customer transport (customers traveling to stores).
Last-mile delivery is the most emissions-intensive per unit, because individual deliveries to residential addresses are inefficient compared to consolidated shipments. A van delivering 50 packages on an optimized urban route is far more efficient per package than a van delivering 10 packages on an ad-hoc suburban route.
Customer transport, the car trip to the store, is frequently overlooked in retail carbon accounting because it happens outside the company’s operations. But studies show customers tend to combine shopping trips with other stops, which means per-item emissions for physical retail may be lower than they appear when calculated per shopping trip.
The Operational Levers That Move the Numbers
Last-mile logistics optimization is where most retailers have the highest near-term leverage. AI-powered demand forecasting reduces split shipments: the practice of sending multiple packages for a single order from different distribution centers. Dynamic route optimization reduces vehicle mileage. Consolidating fulfillment infrastructure closer to major population centers (the “built-out logistics network” approach) can reduce transportation carbon emissions by up to 50% while decreasing shipping weight by 10%.
Fleet electrification is the other major lever for companies with owned delivery fleets. Electric vehicles eliminate tailpipe emissions from last-mile delivery entirely; the remaining emissions shift to electricity generation, which continues to decarbonize as the grid adds renewable capacity.
Ikea found that switching to lighter cardboard pallets for online deliveries reduced transportation costs and emissions by 10%, a straightforward example of the compounding savings available from supply chain weight reduction.
The fastest path to lower transportation emissions isn’t electric vehicles. It’s fewer trips, shorter routes, and heavier loads — operational choices that reduce emissions and operating costs simultaneously.
Technology as the Enabler
Several technologies are converging to make emissions reduction more accessible:
AI-driven logistics platforms can offer size and style recommendations at checkout that reduce return rates, which are a significant source of unnecessary transportation emissions in e-commerce. Emissions tracking databases at the product or SKU level allow retailers to identify high-emission supply chain nodes and target them for optimization.
Power-to-X technology, converting renewable energy into green liquid fuels, could reduce CO2 emissions from freight by 80% or more, according to TED 2021 research. This is early-stage for most commercial applications but worth monitoring as a medium-term option for fleets that can’t be electrified (heavy freight, long-distance transport).
The data infrastructure investment is the prerequisite for all of these. Retailers that have emissions data at the product and supplier level can identify opportunities and negotiate with suppliers using concrete numbers. Retailers that don’t have this data are managing transportation emissions in the dark.
P.S. The EPA’s SmartWay program certifies logistics partners for emissions efficiency. Incorporating SmartWay-certified carriers into your procurement criteria is a low-friction way to begin reducing freight emissions without operational disruption.