Scope 3 emissions are the awkward elephant in the room for most corporate sustainability strategies. They’re often the largest slice of a company’s carbon footprint, yet they sit outside direct operational control. They live in the supply chain, in the products customers use, and in the services third parties provide. So when the question comes up of who’s actually responsible for reducing them, the honest answer is: it’s complicated. And that complexity is exactly why so many organizations struggle to make meaningful progress.
Understanding where accountability sits, and how it gets distributed across a supply chain, is one of the more nuanced challenges in sustainability today. The answer isn’t a single company or a single role. It’s a web of shared responsibility, shaped by regulation, commercial relationships, and organizational capacity. Here’s how it all breaks down.
Why scope 3 emissions are a shared supply chain challenge
Scope 3 emissions don’t belong to one company. By definition, they arise from activities that a reporting organization doesn’t directly control, including everything from raw material extraction and manufacturing by suppliers to product use and end-of-life disposal by customers. That means any given emission in a supply chain could appear as scope 3 for one company and scope 1 or 2 for another, depending on where you sit in the chain.
This overlap is what makes scope 3 a genuinely shared challenge. A retailer’s scope 3 includes the manufacturing emissions of its suppliers. Those same emissions are scope 1 for the manufacturer. Neither company can solve the problem alone. Reducing them requires coordination, data sharing, and aligned incentives across multiple organizations that often have very different priorities, resources, and levels of sustainability maturity.
That shared nature is also what makes scope 3 so politically tricky inside organizations. It’s easy to report on what you own. It’s much harder to influence what you don’t.
How regulatory frameworks assign scope 3 accountability
Regulation is increasingly stepping in to clarify who needs to report on scope 3 emissions, even if it stops short of prescribing exactly how to reduce them. In Europe, the Corporate Sustainability Reporting Directive (CSRD) requires large companies to report on their full value chain emissions, including scope 3 categories that are material to their business. This is a significant shift from voluntary disclosure toward mandatory transparency.
Frameworks like CDP (formerly known as the Carbon Disclosure Project) and the Science Based Targets initiative (SBTi) go further by encouraging companies to set reduction targets that cover their scope 3 footprint. SBTi in particular requires companies with significant supply chain emissions to include those in their targets if they want their goals validated as science-based. That creates downstream pressure: if a large buyer commits to an SBTi target, their suppliers may find themselves under growing pressure to provide emissions data and demonstrate progress.
Regulatory accountability, then, tends to land most heavily on larger companies and those with significant market influence. But the reporting obligations they face don’t stay contained within their own walls. They ripple outward into the supply chain.
The role of lead organizations in driving supplier action
In most supply chains, there’s a lead organization, typically a large brand, retailer, or manufacturer, that holds the most commercial leverage. These companies are often the ones facing the most direct regulatory scrutiny, investor pressure, and public accountability. That position gives them both the responsibility and the practical ability to drive scope 3 reduction across their supplier base.
Lead organizations typically take action through a few key mechanisms:
- Supplier engagement programs: These involve working directly with key suppliers to help them measure and reduce their own emissions. This might include providing tools, training, or access to resources that smaller suppliers couldn’t afford independently.
- Procurement criteria: Embedding emissions performance into purchasing decisions sends a clear market signal. Suppliers who can demonstrate lower carbon intensity become more competitive for contracts.
- Data collection requirements: Many lead organizations now ask suppliers to disclose emissions data, often through platforms like CDP. This creates a baseline for tracking progress and identifying where the biggest reduction opportunities sit.
- Collaborative target-setting: Some companies work with suppliers to set shared reduction goals, aligning timelines and ambitions across the value chain rather than treating it as a one-way demand.
Taken together, these approaches shift scope 3 reduction from an abstract corporate commitment into something that actually changes behavior further down the chain. Lead organizations that combine commercial incentives with genuine support tend to see more traction than those that simply issue requirements without resources. Ultimately, influence matters more than authority when you’re trying to move a supply chain.
Where smaller suppliers and SMEs fit into scope 3 reduction
Smaller suppliers and SMEs occupy a tricky position in all of this. They’re often responsible for a significant share of a supply chain’s total emissions, yet they typically have fewer resources, less technical capacity, and more competing priorities than the large companies asking them to report and reduce.
For many SMEs, the first challenge is simply measurement. Accurately calculating scope 1 and 2 emissions requires data, tools, and some level of expertise. Scope 3 for a small manufacturer, such as the emissions embedded in the raw materials they buy, adds another layer of complexity. Without support from the companies they supply to, many smaller businesses struggle to get started at all.
That said, SMEs aren’t just passive recipients of pressure from above. Many are finding that investing in emissions reduction makes genuine business sense. Lower energy use reduces costs. Cleaner operations can open doors to customers with strong sustainability commitments. And as regulatory requirements expand, getting ahead of the curve is far less disruptive than scrambling to catch up later. The capacity gap is real, but it’s not permanent.
How to bring in specialized expertise for scope 3 programs
Building a scope 3 reduction program from scratch is genuinely complex work. It involves data collection across multiple tiers of a supply chain, stakeholder engagement with dozens or hundreds of suppliers, alignment with frameworks like SBTi or CSRD, and the ongoing challenge of turning data into actionable reduction strategies. Most organizations don’t have all of that capability sitting in-house.
This is where specialized expertise becomes valuable. It’s worth noting that sustainability consulting is a highly specialized field. A scope 3 emissions reduction consultant brings a very different skill set than, say, a CSRD reporting expert or an LCA (life cycle assessment) specialist. The right type of expert depends entirely on where you are in your scope 3 journey and what specific problem you’re trying to solve.
For organizations building out supplier engagement programs, a consultant with hands-on experience in supply chain decarbonization can help design the approach, identify the highest-impact intervention points, and build the internal processes needed to sustain progress over time. For those focused on disclosure and reporting, a specialist in CDP or CSRD reporting will bring a different but equally important set of skills. Matching the expertise to the actual need is what makes the difference between a program that moves forward and one that stalls.
Traditional consultancies can certainly provide this expertise, but they often come with longer lead times and higher costs. For organizations that need to move quickly or want more flexibility in how they access specialist knowledge, working with independent sustainability experts is increasingly common.
Building scope 3 momentum across your supply chain
Scope 3 emissions don’t have a single owner. They’re a shared challenge that requires lead organizations to step up, suppliers of all sizes to engage, and the right expertise to guide the process. The good news is that the frameworks, tools, and talent to tackle this work all exist. The question is whether you have the right people around you to make it happen.
That’s exactly where Dazzle comes in. We match organizations with pre-screened sustainability freelancers, including specialists in scope 3 reduction, supply chain decarbonization, and emissions reporting. Whether you need someone for a focused project or ongoing interim support, we can connect you with the right expert within 48 hours. Our network of 300+ professionals is available year-round, and you choose the engagement model that fits your needs. If you’re ready to make progress on scope 3, reach out to our team and let’s find the right person for the job.
Looking for hands-on support with this? See how our Scope 3 consultants help companies build inventories that hold up to scrutiny.
