DOOH's carbon footprint is now measured — and low

Carbon has gone from a talking point to a measured, comparable number in out-of-home — and the number is flattering. A new Outsmart/KPMG lifecycle study puts OOH at a small slice of advertising’s footprint and the lowest-emitting channel per impression, while Ad Net Zero’s framework and Scope3’s data are turning DOOH emissions into something buyers can demand line by line. For a beauty network, that shifts carbon from a vague virtue into a concrete part of the pitch — and the operating model.

What's happening

OOH is just 3.3% of UK advertising’s power consumption and under 3.5% of its carbon footprint — and the lowest-carbon channel per impression of all media measured (lifecycle analysis vs online, TV, email, radio, print) (Outsmart / KPMG, “Low Carbon, Low Power” — primary).
The footprint is now standardised. Ad Net Zero’s Global Media Sustainability Framework (GMSF) — the cross-channel emissions standard that covers OOH — reaches v1.3 around end-June 2026 (Ad Net Zero — primary).
And measurable at screen level. Scope3 provides DOOH emissions data across 1M+ screens (grid-mix + impression-multiplier model), finding DOOH the lowest-carbon channel per impression (Scope3 — directional/vendor).
For beauty: carbon is becoming a buying criterion — and DOOH’s low footprint is an asset, if your screens are accountable for it.

The headline number, and why it holds up

The Outsmart/KPMG report, “Low Carbon, Low Power,” is the strongest data point because it’s a lifecycle analysis — manufacturing of the display, content storage, distribution, viewing and end-of-life — across six media (OOH, online, TV, email, radio, print). Its finding: OOH accounts for 3.3% of UK advertising’s power and under 3.5% of its carbon, and produces the least carbon per impression of any channel measured, with the figures broken down for classic vs digital OOH (Outsmart / KPMG — primary). The intuition is simple: a single screen is seen by thousands of people, so the per-impression footprint is spread thin — the same one-to-many maths that makes place-based media efficient on cost makes it efficient on carbon.

From claim to currency

What’s new isn’t that DOOH is low-carbon — it’s that the footprint is becoming standardised and auditable. Ad Net Zero’s GMSF gives the industry one cross-channel emissions methodology (OOH included), with v1.3 landing around end-June 2026; Scope3 operationalises it with DOOH emissions data across 1M+ screens, modelled from each screen’s operating hours, brightness and local electricity-grid mix (Scope3 — directional/vendor). The direction of travel: advertisers and agencies with net-zero commitments will increasingly ask for a campaign’s carbon number — and DOOH that can produce one, and show it’s low, wins.

What it means for beauty

For a beauty network, this turns into three practical things:

Carbon is a sales asset — if you can prove it. A salon-screen network can credibly tell a sustainability-minded brand that DOOH is the lowest-carbon channel per impression. But “credibly” now means with data (GMSF/Scope3-style), not a slogan. Inventory that can report its footprint will be easier to sell into net-zero media plans.
Your footprint is mostly screen energy — which you control. DOOH emissions are dominated by electricity: operating hours, screen brightness and the grid mix. That’s the same set of levers in the hardware spec and hardware checklist — efficient panels, sensible brightness and dayparting cut both the power bill and the carbon number, which also helps the payback model.
It reinforces the place-based case, not just the green one. The reason DOOH scores well — one screen, many viewers — is the same reason place-based media compounds. Low carbon per impression is a consequence of the efficiency that already underpins the beauty-DOOH thesis.

The honest caveat: these are aggregate (and largely UK) figures — there is no beauty-venue-specific carbon benchmark, and we don’t assert one. But unlike a CPM, the mechanism (per-impression footprint, dominated by controllable screen energy) carries straight across. The takeaway: carbon is now a number you can put on a beauty-DOOH pitch — make sure your screens can produce it.