Are Scope 4 Emissions the Missing Piece in Carbon Accounting?

 

A few years ago, a new carbon accounting concept began to gain traction in emissions reporting circles which exposed a fundamental gap in how carbon is currently measured.

Most greenhouse gas (GHG) reporting frameworks were built to measure emissions after they happen.

But what if the biggest opportunity isn’t measuring emissions…
it’s preventing them entirely?

This is where the idea of Scope 4 emissions—often referred to as avoided emissions—comes in.

The Limits of Traditional Carbon Accounting

Most organisations are familiar with the three standard emissions scopes defined by the Greenhouse Gas Protocol:

• Scope 1: Direct emissions (e.g. fuel use)

• Scope 2: Indirect emissions from energy (e.g. electricity)

• Scope 3: Value chain emissions (e.g. suppliers, transport, disposal)

These are essential—but they share one limitation:

They only account for emissions that already exist.

They don’t capture emissions that never occur because a better system was used.

What Are Scope 4 (Avoided) Emissions?

Scope 4 emissions refer to emissions avoided as a result of a product, service, or system change.

Examples include:

• Avoided raw material extraction

• Avoided manufacturing processes

• Avoided transportation and logistics

• Avoided waste disposal

In circular systems, these avoided emissions can be substantial—because entire stages of the traditional supply chain are removed.

Why This Matters Now: The Rise of DNSH

This isn’t just theoretical anymore.

Across Europe, companies are increasingly required to demonstrate that their activities comply with “Do No Significant Harm” (DNSH) principles under frameworks like the EU Taxonomy.

DNSH assessments require organisations to show that:

• they are not causing harm across environmental objectives

• they are actively reducing lifecycle impacts

• and crucially, that they are not simply shifting emissions elsewhere in the system

This is where Scope 4 thinking becomes critical.

Because:

You can’t demonstrate “no significant harm” if you’re only measuring what you emit—you must also understand what you avoid.

Where Circular Models Change the Game

Traditional supply chains are fragmented:

• extraction → processing → manufacturing → transport → use → disposal

Each stage adds emissions.

Circular models compress this system.

With platforms like ReallyRecycle.com:

• materials are recovered locally

• remanufactured into new products

• and reused within the same system

This eliminates:

• repeated raw material extraction

• long-distance logistics

• and disposal emissions

In other words, it removes entire emission sources—not just reduces them.

Why Scope 4 Is Difficult (But Essential)

Scope 4 emissions are harder to measure because:

• there is no universal standard

• avoided emissions require counterfactual assumptions (“what would have happened otherwise?”)

• supply chain data can be fragmented

However, many of these effects are already implicitly included in:

• conversion factors

• lifecycle assessments

• system-level modelling

And increasingly, regulators and investors expect companies to understand this.

A Shift from Reporting to System Design

What’s emerging is a shift in thinking:

• Old model: Measure emissions and try to reduce them

• New model: Design systems where emissions don’t occur in the first place

Scope 4 isn’t just a reporting category—it’s a design principle.

The Bigger Opportunity

Scope 4 emissions often represent the largest untapped reduction potential across entire sectors.

They also unlock:

• cross-industry collaboration

• supply chain redesign

• innovation in materials and production

And when applied at scale, these avoided emissions aggregate across markets, not just individual companies.

The Bottom Line

Scope 4 emissions may not yet be formally standardised—but they are already shaping:

• regulatory expectations (via DNSH and EU frameworks)

• investor scrutiny

• and competitive advantage

Organisations that understand and act on avoided emissions won’t just report better numbers.

They will build fundamentally lower-carbon systems.

What Comes Next?

The future of sustainability isn’t just about reducing emissions.

It’s about:

• eliminating unnecessary processes

• localising production

• and designing circular systems that avoid emissions altogether

Are you measuring emissions—or redesigning your system to prevent them?