The Upstream Imperative: Mastering Emissions Beyond Tier 1

created-date: 2023-10-27T10:00:00.000Z

summary: Discover why focusing only on your direct suppliers is a dead end for Scope 3 reduction. Learn a practical, commercially-grounded playbook to influence emissions deep within your value chain, turning Tier 1 partners into agents of change.

blog-thumbnail-image: /assets/images/blog/upstream-value-chain.png

author: DitchCarbon

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The Problem Hiding in Plain Sight

Many leadership teams I speak to are facing the same frustrating reality. They have a solid grasp of their own operational emissions and have spent months, if not years, engaging their direct, Tier 1 suppliers. They’ve sent the surveys, collected the data, and built their initial Scope 3 inventory. Yet the decarbonisation needle refuses to move.

Why? Because for most businesses, the overwhelming majority of emissions aren’t generated by the suppliers they have contracts with. They lie further upstream, with the suppliers of their suppliers-the raw material extractors, the component manufacturers, the farmers. These are organisations you have no direct relationship with, no contract, and seemingly, no influence over. It feels like trying to steer a ship from a neighbouring boat.

Where Most Teams Get Stuck

The common mistake is treating this as a data collection problem. The default response is to cascade surveys down the value chain, asking each supplier to chase data from their own suppliers. This approach is almost always doomed to fail. It becomes a game of telephone with emissions data, where the quality degrades at each step and response rates plummet. You end up with a patchwork of estimates and proxies that no one, least of all your auditor, truly trusts.

This leads to a sense of powerlessness. Teams feel their influence ends with their purchase order. They believe that because they don’t have a commercial lever to pull with a Tier 2 or Tier 3 supplier, they have no power to drive change. This is a false and unhelpful assumption. Your influence doesn’t end with your direct supplier; it is simply channelled through them.

What Good Actually Looks Like

Instead of policing your suppliers, you need to partner with them. The most effective programmes I’ve seen treat key Tier 1 suppliers not as data entry clerks, but as strategic allies in decarbonisation. The goal is to equip and empower them to become agents of change within their own value chains.

Good isn’t about having perfect Tier 3 data. It’s about using your Tier 1 relationship as a fulcrum to create leverage further upstream.

Consider a large food and beverage company. They quickly realise a huge portion of their emissions comes from the agricultural practices used to grow their ingredients. They have no direct contact with the thousands of individual farms. Instead of a futile attempt to survey them all, they identify their top ten ingredient processors-their Tier 1 suppliers.

They work with one processor on a joint initiative. They co-fund a programme to provide training and resources on regenerative agriculture to the farms in that processor’s network. They offer the processor preferential terms for sourcing from farms that adopt these practices. The result? The processor secures a more resilient and sustainable supply chain. The farms get support to improve their land and yields. And the company gets credible, measurable emissions reductions right from the source.

A Practical Playbook for Upstream Engagement

Shifting from data chasing to strategic engagement requires a different mindset and a clear plan. It’s less about spreadsheets and more about commercial conversations.

First, you must map influence, not just emissions. Use the data you have to identify which of your Tier 1 suppliers act as gateways to the biggest upstream hotspots. A clear view from a good platform is essential here, helping you cut through the noise and see where your effort will have the greatest impact. Don't try to boil the ocean; focus on the critical few.

Second, bring your procurement team to the table as true partners. This isn’t a sustainability reporting exercise; it’s a strategic imperative for building a resilient, future-proof supply chain. Frame the conversation around long-term cost reduction, supply assurance, and joint innovation, not just carbon targets. When buyers see decarbonisation as a commercial lever, they will find ways to use it.

Finally, change the nature of the request. Instead of just asking for data, ask your strategic suppliers what they need to decarbonise their own supply base. Would a joint business case help them convince their board? Could you introduce them to green financing options? By co-investing in the solution, you turn a compliance burden into a shared commercial opportunity.

Your Best First Step This Quarter

This all sounds good in theory, but where do you start? Don’t try to launch a programme across your entire supply base at once.

Your single best first step is to pick one strategic Tier 1 supplier. Choose one where the upstream emissions are significant, but also where you have a strong, collaborative relationship. Approach them not with a new set of demands, but with a proposal for a joint pilot project. Frame it as an innovation partnership. The goal for the next 90 days isn’t to solve your entire upstream emissions problem. It’s to build one success story that proves the model-a case study you can use to inspire action across the rest of your supply chain.

Stop chasing data down the value chain. Start sending influence up it. Your purchase order isn't the end of your responsibility; it's the beginning of your leverage.

length: 5 minute read

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category: Sustainable Procurement

name: Your Biggest Emissions Problem Isn't in Your Supply Chain-It's in Theirs

slug: your-biggest-emissions-problem-isnt-in-your-supply-chain-its-in-theirs