KAEFER Cut Scope 2 Emissions by 68% Without Buying a Single Offset. Here's the Framework They Used.

The updated Greenhouse Gas Management Hierarchy, released this week by the Institute of Sustainability and Environmental Professionals (ISEP), gives companies a four-step framework for cutting emissions: Eliminate, Reduce, Substitute, Remove. KAEFER UK & Ireland used it to cut Scope 2 emissions by 68.5% and Scope 1 by 14.5%, all without purchasing carbon offsets. With energy prices swinging due to geopolitical instability, the framework doubles as a cost control strategy. This post breaks down the hierarchy, walks through KAEFER's approach, and explains how to apply it in your own organization.

The offset trap

Most companies start their decarbonization work in the wrong place. They look at their emissions footprint, feel the weight of it, and reach for carbon credits. You write a check, someone plants trees or protects a forest, and your carbon balance sheet looks better.

But nothing changed inside your business. Your operations still burn the same fuel. Your buildings still draw the same power. Your supply chain still runs on diesel. When energy prices spike, as they did this spring after instability in the Strait of Hormuz rattled oil markets, you're just as exposed as before.

ISEP has been arguing against this approach since 2009, when they first published the Greenhouse Gas Management Hierarchy. The UNFCCC and ISO both adopted it. On April 2, 2026, ISEP released an updated version that sharpens the framework's practical application, with stronger guidance on supply chain emissions and fossil fuel transition.

The core idea is simple: offsets come last. Everything else comes first.

Four steps, in order

The hierarchy has four levels, and the sequence matters.

1. Eliminate. Before you try to make a process more efficient, ask whether it needs to exist. Can you replace a business trip with a video call? Can you stop heating an empty warehouse? Can you cut a manufacturing step that produces waste without adding value? KAEFER UK started here, examining their project design process and asking where emissions were built in before anyone turned on a machine. They cut unnecessary transport, reduced site mobilization, and redesigned workflows to prevent rework. None of this required new technology. It required paying attention.

2. Reduce. Once you've eliminated what you can, make what remains more efficient. Better insulation, smarter HVAC scheduling, equipment upgrades, behavioral programs. KAEFER ran a driver behavior campaign that cut vehicle idling by 47%. That single initiative reduced fuel costs and emissions at the same time.

3. Substitute. Replace fossil fuel energy with low-carbon alternatives. Switch to renewable electricity. Electrify your vehicle fleet. Source lower-carbon materials from your supply chain. KAEFER transitioned their facilities to renewable electricity and started introducing hybrid and electric vehicles. This step directly reduces exposure to energy price volatility. Once you're running on renewables, OPEC doesn't set your electricity price.

4. Remove. Only after steps one through three should you address residual emissions with carbon credits, direct air capture, or other removal methods. KAEFER chose not to use offsets at all, focusing entirely on the first three steps. Their results suggest that for many companies, the residual emissions left after genuine operational change are small enough that removal can wait.

Why the order matters more than most companies think

ISEP structured this as a hierarchy, not a menu, for a reason. When companies cherry-pick, they usually skip straight to Substitute (buying renewable energy certificates) or Remove (buying offsets). Both let you claim progress on paper without changing how you operate.

The hierarchy forces a different conversation. Before you buy anything, you have to look at what you're doing and ask whether you need to do it at all, and whether you're doing it well. Those questions tend to surface cost savings that finance teams care about.

This is where the sustainability initiative becomes a business case. Eliminating waste saves money. Reducing energy consumption saves money. Substituting volatile fossil fuels with fixed-price renewable contracts saves money, or at least makes costs predictable. The first three steps pay for themselves. Offsets don't.

The KAEFER numbers

KAEFER UK & Ireland provides technical services across energy, industrial, nuclear, and construction sectors. They're not a tech startup with a small footprint. They operate on construction sites, run heavy equipment, and move materials and people across the country.

Their results after applying the hierarchy:

• 14.5% reduction in Scope 1 emissions (direct emissions from fuel combustion, company vehicles)

• 68.5% reduction in Scope 2 emissions (indirect emissions from purchased electricity)

• 47% reduction in vehicle idling through behavioral change programs

• Zero reliance on carbon offsets

Sara Roberts, Head of ESG at KAEFER UK & Ireland, described their approach as starting with project design (Eliminate), moving through operational improvements and behavioral programs (Reduce), then switching energy sources (Substitute). They made a deliberate choice to skip offsets entirely.

"We focus on delivering real, measurable reductions within our operations," Roberts said in a statement alongside the GHGMH release. The company's targets are aligned with the Science Based Targets initiative (SBTi).

Energy price volatility makes this urgent

The updated hierarchy arrives during serious energy market instability. The situation in the Strait of Hormuz has pushed oil prices higher and reminded businesses that fossil fuel dependence is an operational risk, not just an environmental concern.

ISEP CEO Sarah Mukherjee put it bluntly: "Rising energy prices linked to geopolitical instability highlights the urgent need for organisations to reduce their risk and increase their resilience to global shocks by taking control of their own energy use and emissions."

This framing matters because it turns decarbonization from a compliance exercise into a risk management strategy. Companies that have already moved through the first three steps are less exposed to fossil fuel price swings. Their costs are more predictable. Their operations are harder to disrupt.

Council Fire has been tracking this dynamic since the Hormuz situation began, and the pattern holds: every energy price shock strengthens the business case for electrification and renewables.

How to apply the hierarchy in your organization

If you're starting from scratch, here's a practical sequence:

Map your emissions first. You can't eliminate what you haven't measured. Get a baseline across Scope 1, 2, and 3. If you don't have Scope 3 data yet, start with Scope 1 and 2 and build out supplier engagement over time. Council Fire's climate data strategy guide covers this in more detail.

Run an elimination audit. Walk through your operations with fresh eyes. What processes, trips, or activities could be removed entirely without affecting output? This is often the hardest step because it requires questioning assumptions that have been baked in for years. It's also usually the cheapest.

Target your biggest energy consumers. Look at your facilities, equipment, and fleet. Where is energy being wasted? Heating empty spaces, running equipment at full capacity when half would do, keeping older systems that use more than newer alternatives. Small operational changes add up fast.

Build a substitution roadmap. Map out when your current energy contracts expire and plan to switch to renewable alternatives. Look at your vehicle fleet replacement cycle and schedule electric or hybrid replacements. Talk to your key suppliers about their own transition timelines.

Only then consider removal. Whatever emissions remain after the first three steps are your residual footprint. These are worth offsetting, if you choose to offset at all. But you'll find the number is much smaller than where you started.

The supply chain piece

The updated hierarchy puts more emphasis on Scope 3 emissions than the 2009 original. This is where most companies' largest emissions actually live, buried in supply chains, business travel, and product use.

Applying the hierarchy to Scope 3 requires different work. You can't directly control your suppliers' energy sources. But you can set procurement standards, favor suppliers who have their own science-based targets, and use contract renewal as leverage.

This tracks with what we're seeing across corporate sustainability strategy more broadly. Companies that treat their supply chain as a black box are falling behind those who engage suppliers as partners.

What this means for your reporting

If your organization reports under any major ESG framework (GRI, ISSB, or voluntary TCFD-aligned disclosures), the hierarchy gives you a clearer story to tell. Rather than reporting a single net emissions number that mixes reductions with offsets, you can break out your progress by hierarchy level.

Investors increasingly want to see this distinction. A company that reduced Scope 2 by 68% through operational changes tells a very different story than one that bought enough credits to claim the same reduction on paper. The first company made its business more resilient. The second just spent money.

Council Fire's ESG reporting guide covers how to structure these disclosures well.

Related resources

• The Hormuz Blockade Proved What Renewables Advocates Have Argued for Decades -- How geopolitical instability strengthens the case for clean energy transition.

• Your Climate Data Strategy Can't Wait for Washington -- Why starting emissions measurement now beats waiting for regulatory clarity.

• The Complete Guide to Corporate Sustainability Strategy -- A full framework for building sustainability into business operations.

• Corporate Fleet Electrification Just Hit a Turning Point -- What 10,000 fleet managers say about the shift to electric vehicles.

• Climate Resilience & Adaptation: A Strategic Framework -- How to build organizational resilience against climate-driven disruption.

Frequently asked questions

What is the Greenhouse Gas Management Hierarchy?

The GHGMH is a four-step framework developed by ISEP for reducing emissions in a specific order: Eliminate, Reduce, Substitute, Remove. First published in 2009 and adopted by the UNFCCC and ISO, the April 2026 update adds stronger guidance on supply chain emissions and fossil fuel transition.

Do I have to follow the steps in order?

The hierarchy is designed to be followed sequentially. In practice, companies often work on multiple levels at once, but the framework pushes you to prioritize elimination and reduction before jumping to substitution or offsets.

Can small and mid-sized companies use this framework?

Yes. The hierarchy is scale-agnostic. A 50-person company can run an elimination audit just as well as a 5,000-person one. The framework is open-source and freely available from ISEP.

How does this relate to Science Based Targets (SBTi)?

The two are complementary. SBTi sets your target; the GHGMH tells you how to get there. KAEFER uses both: SBTi-aligned targets with the hierarchy guiding their implementation strategy. SBTi has increasingly emphasized that offsets should not count toward near-term targets, which lines up with the hierarchy's "removal as last resort" approach.

What about carbon offsets? Are they always bad?

No. The hierarchy doesn't say offsets are bad. It says they should come after you've done everything else. There will always be residual emissions that are genuinely hard to eliminate through operational changes. For those, high-quality removal credits (direct air capture, biochar) are a reasonable tool. The problem is when companies use offsets instead of making operational changes, rather than alongside them.