Unpacking Scope 3: Category 4 – Logistics emissions | Tackling upstream transport & distribution
GHG Scope 3 Upstream activites | Category 4 – Upstream transportation and distribution
This is the last of the first four Scope 3 categories whose time boundary happended in the past compared to the reporting period.
Every product or material that enters your business has already travelled a long way, often by truck, ship, train or plane. Each of those journeys leaves behind a trail of emissions.
Scope 3 Category 4 “Upstream transportation and distribution” captures these often-overlooked GHG emissions from the movement of goods before they reach your operations, including transport and storage that your company doesn’t directly own or control.
What does it include?
Category 4 covers emissions from the transportation and warehousing of purchased goods and materials between suppliers, manufacturers and distribution centers. This includes:
- Freight moved by third-party logistics providers
- Storage in warehouses not owned or operated by your company
- Air, sea, rail and road transport used by suppliers or contractors
Even though these emissions don’t occur on your property or under your control, they’re part of your value chain responsibility because your business decisions influence them such as how and where you source products.
Why it matters
Logistics can be one of the biggest and most complex parts of a company’s carbon footprint. Reducing these emissions not only improves sustainability but can also:
- Cut costs through smarter routing and fuel efficiency
- Strengthen supplier collaboration
- Enhance transparency for ESG reporting and supply chain resilience
In short, low-carbon logistics are very likely to be also efficient logistics.
How to measure and reduce Category 4 emissions
- Start with freight data: Collect shipment records from suppliers or logistics partners distance, weight and mode of transport.
- Apply mode-specific emission factors: Use trusted data sources (e.g. DEFRA, EPA) to calculate emissions for road, air, sea or rail freight.
- Prioritize low-carbon transport: Shift to electric or hybrid fleets, optimise container loads or choose rail and sea over air when possible.
- Collaborate across the chain: Work with logistics providers that use green fuel alternatives or carbon-efficient routing technologies.
- Improve warehousing efficiency: Encourage partners to adopt renewable energy and smart storage systems.
The bigger picture
Transportation emissions are visible, measurable and actionable, making them a great starting point for Scope 3 reduction strategies. As pressure grows for cleaner supply chains, companies that decarbonise logistics will not only lower emissions but also improve speed, reliability, resilience and brand reputation.
Key takeaway: Every shipment tells a carbon story. By tackling upstream transport and distribution, companies can turn logistics from a climate challenge into a climate solution.
