DOOH sustainability.

The independent research

Outsmart, the UK's out-of-home trade body, commissioned KPMG to measure the medium's environmental footprint end to end, publishing the findings in the report "Low Carbon, Low Power: An analysis of OOH energy consumption and CO2 emissions." Rather than lean on any single company's estimate, the study covers the full lifecycle a screen or a printed panel goes through: manufacturing the display and its viewing support, storing the advertising content, transporting and distributing it, the actual viewing of the content, and end-of-life disposal.

The headline finding is a size comparison, not a claim of zero impact. According to Outsmart's KPMG-backed research, out-of-home advertising makes up less than 3.5% of the total carbon footprint of the UK's entire advertising industry, a small slice of a category that also includes online, TV, radio, print and email. On power consumption specifically, out-of-home represents about 3.3% of UK advertising's total power use, notably lower than its roughly 3.8% share of UK advertising spend, meaning the medium's power footprint is smaller than the share of the market it commands.

The research also compared out-of-home against the other media it measured on a like-for-like basis: carbon emitted per impression delivered. Among online, TV, radio, print and email, the KPMG research found out-of-home produces the least carbon emissions per impression of any of them. For more sourced DOOH figures alongside this one, see the DOOH statistics guide.

Why out-of-home compares well

One screen in a public place can be seen by many people from a single point of power draw. A phone, a laptop or a television each need their own screen and their own supply, and each is usually watched by far fewer people at a time than a busy roadside or transit panel. The KPMG research does not attribute its result to one single cause, but that shared-infrastructure logic lines up with the finding: out-of-home produced the least carbon per impression of the media it measured.

"Compares well" is not the same as "no impact." Out-of-home still consumes real materials and real power across manufacturing, distribution and viewing; the finding is about how that footprint splits per person reached, not about the footprint disappearing. Reading the figures honestly means holding both facts at once: a genuinely small share of the industry's total impact, and a medium that still has one to account for.

What digital adds, and does not remove

LED digital billboards use meaningfully less energy per unit of brightness than the older lighting technologies they replaced, such as incandescent or neon signage. That efficiency is one reason digital out-of-home has been able to grow its share of the medium without a matching jump in energy use, and it is covered in more detail in the outdoor LED billboard guide.

Digital also removes a category of waste that static posters carry. A printed billboard consumes paper or vinyl for every creative change, and every change means a physical print run, a delivery vehicle, and eventual disposal of the old poster. A digital screen swaps the creative with a file upload instead, so it does not consume paper or vinyl and does not generate the transport and disposal waste of physically changing a printed poster.

None of that makes a digital screen weightless. Unlike a static poster, a digital screen draws power continuously while it is switched on, whether or not anyone is looking at it in a given hour. So the fair question is not simply "digital versus static" but how the screen's time is used, which is where scheduling enters, and where an industry-wide research finding meets the way one specific platform actually buys and sells the medium.

The industry's own commitments

Independent research is one half of accountability; what the industry does with it is the other. The World Out of Home Organisation, the medium's global trade body, has established a Global Sustainability Task Force to coordinate how out-of-home companies measure and reduce their environmental impact.

WOO has also publicly supported Ad Net Zero's Global Media Sustainability Framework, a voluntary global effort to standardize how the advertising industry as a whole, not out-of-home alone, measures and reduces its environmental footprint. Standardized measurement matters because, as the first chapter of this guide noted, different studies measure different things; a shared framework is what eventually lets an out-of-home figure be compared fairly against a TV or online one.

Neither commitment is a certification that every operator or every screen meets a specific carbon standard today. It is a stated direction and a shared measurement effort, and it is reasonable to expect more operator-level disclosure to follow as the framework matures.

How Blindspot's buying model avoids waste

Blindspot is not a sustainability-certified platform, and this guide is not the place to claim otherwise. What Blindspot does control is how a campaign uses the screens it books, and the same waste that costs an advertiser money is time a screen spends running for an audience that is not there.

Blindspot schedules more than 3,000,000 screens across 50-plus countries by the hour rather than renting one around the clock, and prices every booking per play, from about $0.23 a play on urban screens, rather than a flat rate for the whole flight. An advertiser who books only the hours their audience is actually out is not paying for, and not scheduling plays into, the overnight and dead midday windows a traditional flight rents regardless. See how booking works end to end, or check current per-play pricing.

To be direct about what that does and does not mean: cutting wasted plays is a buying efficiency, not a measured carbon reduction. Blindspot does not currently measure or certify its own carbon footprint. Fewer wasted plays plausibly means less wasted screen time, but that is a reasonable inference, not a verified number this guide can put behind a chart.