Most ESG Reports Ignore Marketing Completely
Brands publish detailed ESG reports covering supply chains, packaging, and operations — yet the largest controllable source of Scope 3 emissions is quietly missing: the marketing budget.
The marketing emissions blind spot is the widespread failure of corporate ESG disclosures to account for the carbon footprint generated by digital advertising, programmatic media buying, and the broader media supply chain. Most ESG reports from the world's largest consumer brands contain remarkable detail on supply chains, packaging, and operations — yet they systematically omit what is arguably the largest controllable source of Scope 3 emissions: the marketing budget. Activities that collectively consume electricity at a scale that rivals many industrial operations are simply not being reported.
What Is the Biggest Blind Spot in Every ESG Report?
Walk through the ESG disclosures of the world's largest consumer brands and you will find remarkable detail. Carbon intensity per unit of production. Water usage in the supply chain. Percentage of recycled packaging. Supplier audit completion rates.
What you almost never find is a single line about the carbon footprint of their advertising.
This is not a minor omission. Digital advertising is one of the most energy-intensive activities a modern business conducts at scale. A single programmatic campaign — running millions of ad auctions per second across data centres on multiple continents — consumes electricity at a rate that would embarrass most operations teams if it appeared in their Scope 2 disclosures.
Yet it doesn't. Because no one is asking marketing to show up to the ESG conversation.
Key Data Points: The Scale of Marketing Emissions
| Metric | Figure | Source / Notes |
|---|---|---|
| Global digital ad spend (2024) | $600B+ | Industry consensus |
| CO₂ per ad impression (average) | 1–5 grams | Scope3 and peer research |
| Programmatic spend with no measurable outcome | 40–60% | Consistent industry estimates |
| ESG frameworks that mandate advertising disclosure | 0 | GRI, SASB, TCFD reviewed |
| Year CSRD takes full effect for large EU companies | 2025 | EU regulatory timeline |
Scale 1–5 grams of CO₂ per impression across tens of billions of impressions and you arrive at an emissions figure that dwarfs the operational footprint of many mid-sized manufacturers. The carbon is real. The accounting for it is not.
Why Does Marketing Get Excluded From ESG Reporting?
The exclusion is not malicious. It is structural.
ESG frameworks — GRI, SASB, TCFD — were built by people who understood manufacturing, logistics, and finance. They mapped the material sources of corporate emissions and identified the obvious levers: energy procurement, fleet electrification, supplier engagement.
Marketing was never in the room. And so the frameworks don't ask the right questions.
The result is a category of Scope 3 emissions — those generated by the activities of third parties that a company pays for — that is systematically underreported. Ad tech platforms, media buying, programmatic infrastructure, content distribution networks: all of it sits outside the standard accounting perimeter.
Most CMOs have no idea what their media supply chain emits. Most CFOs don't either. And because ESG reports are not currently required to disclose it, neither group is under any pressure to find out.
How Large Is the Carbon Footprint of Digital Advertising?
The numbers, when you do look at them, are striking.
Global digital advertising spending exceeded $600 billion in 2024. Research from Scope3 and others suggests that the average digital ad campaign generates between 1 and 5 grams of CO₂ per impression depending on the channel, format, and supply chain path. Scale that across tens of billions of impressions and you arrive at an emissions figure that dwarfs the operational footprint of many mid-sized manufacturers.
There is also the question of wasted impressions. Industry estimates consistently suggest that between 40% and 60% of programmatic ad spend produces no measurable business outcome. Those impressions still burn electricity. The emissions are real even when the results are not.
This means that a significant portion of marketing's carbon footprint is not just unaccounted for — it is generated by activity that delivers no value whatsoever.
What Does Good Marketing ESG Disclosure Actually Look Like?
A small number of organisations are beginning to treat marketing emissions as a material ESG issue. They are doing three things differently:
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Measuring at the impression level. This means working with platforms and partners that provide carbon data at the impression level — not just headline estimates, but route-level data that shows how emissions vary by supply chain path, publisher, format, and geography.
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Optimising for both carbon and performance. The insight that a lower-carbon campaign path often correlates with a lower-waste programmatic path is not a coincidence. Clean supply chains — shorter auction paths, fewer intermediaries, higher-quality inventory — tend to perform better on both dimensions. Cutting carbon and cutting waste are frequently the same decision.
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Disclosing inside the main ESG report. Not in a separate sustainability report buried on the investor relations page, but inside the main ESG disclosure, alongside other Scope 3 categories, with methodology notes and year-on-year comparisons.
Where Is ESG Regulation Headed for Advertising?
This voluntary approach will not remain voluntary for long.
| Regulation | Jurisdiction | Relevance to Marketing |
|---|---|---|
| EU Corporate Sustainability Reporting Directive (CSRD) | European Union | Requires reporting on all material Scope 3 categories |
| EU Green Claims Directive | European Union | Legal obligations on substantiation of environmental marketing claims |
| SEC Climate Disclosure Rules | United States | Signals mandatory Scope 3 direction, though contested |
| GRI / SASB Updates | Global | No current advertising category; materiality pressure growing |
None of these frameworks currently name advertising as a mandatory disclosure category. But as the materiality of digital media emissions becomes better understood, that will change. Companies that have spent the last three years building measurement infrastructure will be well positioned. Companies that have ignored the issue will face a disclosure problem and a credibility problem at the same time.
Why Does This Matter for CMOs and ESG Credibility?
There is a deeper issue beyond compliance.
Brands spend significant resources communicating their sustainability commitments. They fund campaigns about ocean restoration, net zero pledges, and circular economy programmes. Those campaigns themselves consume energy, generate emissions, and in many cases reach audiences who will never act on the message — because the targeting was imprecise and the media plan was inefficient.
The contradiction is not lost on informed observers. An advertiser that claims carbon neutrality while running a programmatic campaign through a supply chain it has never audited is not making a credible ESG statement. It is making a marketing statement that happens to use ESG language.
The CMO who takes ESG seriously does not just approve the sustainability messaging. They audit the media supply chain, set emissions targets for campaigns, and report against them with the same rigour they would apply to any other material business metric.
What Needs to Change in ESG Reporting Standards?
ESG frameworks need to catch up with the reality of modern marketing. That means three specific changes:
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Reporting standards bodies need to add digital advertising and media supply chain emissions to their Scope 3 guidance — not as an optional disclosure but as a material category for any company with a significant media budget.
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CMOs need to claim ownership of their emissions data, not outsource it to the sustainability team or ignore it entirely. Marketing is one of the largest controllable cost centres in most consumer businesses. It is also one of the largest uncontrolled emission sources.
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Investors need to start asking the question. When an asset manager reviews an ESG disclosure, they should be asking: where is the marketing emissions data? What is the carbon intensity of your media spend? How has it changed year on year?
Until those questions are asked, the answer will continue to be: nowhere. Because no one is looking.
What Is the Business Opportunity for Brands That Move First?
The brands that move first on this will not just reduce their emissions. They will build a structural advantage.
Marketing efficiency and carbon efficiency are, in the world of programmatic advertising, the same thing. A campaign that reaches the right audience through a clean, short supply chain generates fewer emissions and delivers better results. The optimisation is not a trade-off. It is the same decision made well.
The ESG report of 2030 will look very different from the ESG report of 2024. It will include a marketing emissions section. It will show Scope 3 advertising data alongside supplier emissions and product lifecycle figures. It will be audited.
The question for marketing leaders today is not whether that future is coming. It is whether they want to be ahead of it or behind it.
Frequently Asked Questions
Q: Why aren't digital advertising emissions included in ESG reports?
A: ESG frameworks like GRI, SASB, and TCFD were designed primarily around manufacturing, logistics, and finance. Digital advertising and media supply chains were never incorporated into the original Scope 3 guidance, meaning there is currently no mandatory requirement for companies to disclose them — even though they can represent a significant share of a brand's controllable emissions.
Q: How much CO₂ does a digital advertising campaign produce?
A: Research from Scope3 and similar organisations estimates that the average digital ad impression generates between 1 and 5 grams of CO₂, depending on the channel, format, and programmatic supply chain path. Across a campaign running tens of billions of impressions, this can produce an emissions footprint that rivals or exceeds that of many mid-sized industrial operations.
Q: What is the connection between programmatic ad waste and carbon emissions?
A: Industry estimates suggest 40–60% of programmatic ad spend produces no measurable business outcome — yet those impressions still consume electricity and generate real carbon emissions. This means a substantial share of marketing's carbon footprint is attributable to activity that delivers zero commercial value, making waste reduction and carbon reduction effectively the same optimisation goal.
Q: Will regulators eventually require companies to disclose advertising emissions?
A: Increasingly, yes. The EU's CSRD already requires large companies to report on all material Scope 3 categories, and as the materiality of media supply chain emissions becomes better quantified, advertising is likely to be explicitly named. Companies building measurement infrastructure now will be better positioned than those waiting for mandatory requirements.
Q: What should a CMO do today to address marketing emissions?
A: Three immediate steps: (1) Work with ad platforms and partners that provide impression-level carbon data; (2) audit the programmatic supply chain for both waste and emissions, since reducing one typically reduces the other; and (3) include marketing emissions data in the company's main ESG disclosure alongside other Scope 3 categories, with clear methodology and year-on-year comparisons.
Key Takeaways
- The marketing emissions blind spot is large and growing. With global digital ad spend exceeding $600 billion in 2024, and 1–5 grams of CO₂ generated per impression, the advertising industry's carbon footprint is material — yet almost universally absent from corporate ESG disclosures.
- 40–60% of programmatic spend generates no business outcome, but still burns energy. Wasted impressions represent an emissions liability with zero commercial return, making ad efficiency and carbon efficiency inseparable objectives.
- ESG frameworks have not yet caught up. GRI, SASB, and TCFD do not currently mandate advertising emissions disclosure, creating a systemic accountability gap that regulators — particularly in the EU — are beginning to address.
- Marketing efficiency and carbon efficiency are the same decision. Cleaner programmatic supply chains — shorter auction paths, fewer intermediaries, higher-quality inventory — consistently outperform on both emissions and campaign performance metrics.
- First movers will gain a structural advantage. Brands that build marketing emissions measurement infrastructure now will be ahead of regulatory requirements, more credible in their ESG claims, and better positioned as investor scrutiny of Scope 3 data intensifies through 2025–2030.
