Outdoor or out-of-home (OOH) ads are modernizing, ditching static paper and paste formats for ever-changing illuminating digital screens. Media owners are locked in an upgrade race, but with climate crisis anxiety heating up, is the sector’s savior tech compatible with the sustainability needs of society?
Outdoor or out-of-home (OOH) ads are modernizing, ditching static paper and paste formats for ever-changing illuminating digital screens.
Media owners are locked in an upgrade race, but with climate crisis anxiety heating up, is the sector’s savior tech compatible with the sustainability needs of society?
One 2010 study claimed a 48-sheet digital billboard (6.096m x 3.048m) consumes about 30 times more energy than the average American household in a year.
2019 research from Adblock Bristol showed that a much smaller but double-sided digital freestanding unit from Clear Channel used more electricity than four homes each year.
Meanwhile, a large JC Decaux billboard was found to consume the equivalent of 36 homes “if it was running for a full year at maximum output.” These are thirsty machines.
86 digital out-of-home (DOOH) boards in Manchester city center each use an average of 11,501kWh of electricity every year. That’s roughly 345 households’ worth. But these units deliver £2.4m a year in rent, plus 2.8% of the revenue from each ad. That’s well in excess of £6,956 per ‘household.’
UK OOH, issues a defense saying media owners have been seriously reducing their carbon impact, prioritizing energy-efficient suppliers and supply chains, buying renewable energy and offsetting carbon. Anything from adopting non-fossil fuel fleets to ditching plastic coffee cups is on the table.
Research from Cavai estimates that the average online ad impression emits the same amount of carbon dioxide (CO2) into the atmosphere as driving an electric car between 0.4 to 9.65m, watching a 40 inch $K OLED TV between 1.5 to 35 seconds, or having a LED light bulb on between 30 and 700 seconds.
The energy consumption of a single impression is between 0.14Wh and 1.93Wh.
Meanwhile, Ovo estimates the average annual UK household electricity consumption sits at 3,760,000Wh per year, the equivalent of a mere 26,857,142 ad impressions.
That’s a lot of online impressions. Furthermore, advertising likely added an extra 28% to the annual carbon footprint of every single person in the UK in 2019.
“On a ‘carbon-impact-per-ad-served’ basis OOH is an incredibly low-impact advertising medium because every OOH ad is seen by thousands of people.”
As an extreme example, London’s Piccadilly Lights reaches more than 56 million people a year. The energy costs will be extremely high, but how many individual screens would advertisers would have to render ads on to reach all those people individually?
One study claims that a 14×48m digital billboard with LED bulbs uses only twice as much power as a static billboard, and adds that LED lights use about 75% less energy than incandescent bulbs (although you need way more of them). Other studies have digital using as much as 13 times more energy.
Also on the horizon are more efficient LED lighting and solar panels, as well as fleets of electric vehicles, pollinator-friendly infrastructure ‘living roofs’ and CO2 scrubbers to improve air quality.
DOOH is compatible with sustainability.