Charity Sea Cleaners and outdoor media company JCDecaux have teamed up to combat the worst out of home ads in the world – litter.
These ads might not have briefed or approved, but they are out there doing damage to brands as well as the environment every day.
A study published in the Journal of Business Research*, and validated for the local market by Nielsen, shows that when a brand appears as litter, people are willing to pay less for its products. 2% less.
Thatโs why Sea Cleaners and JCDecaux have teamed up to combat litter and take those ads out of rotation.

Kurt Malcolm, head of trading platforms at JCDecaux, says: โRemoving the worst outdoor ads allows us to deliver on our sustainability commitments, but also our commitment to iconic, impactful out of home advertising, and making sure our clients are only seen in the right way, in the right places.โ
Help brands measure negative impressions
Every discarded bottle, can or wrapper becomes an unintended brand impression. And unlike traditional outdoor media, these impressions can actively damage perception rather than build it.
On April 2, Sea Cleaners and JCDecaux have launched Reverse Media Schedules, a new media product designed to help brands understand and respond to these negative impressions. It treats litter as a form of unplanned media and measures the value of removing it.
Developed by Dentsu Creative, along with advisory partners Finch and audience data experts Nielsen – they have combined litter audits, audience data and media modelling to calculate where branded waste is appearing, how visible it is and the potential impact on consumer perception and purchasing behaviour.
Gaining momentum
Research conducted by Nielsen surveying 1,000 people across 124 coastal destinations reinforces the impact. It found that 17.2% of people could recall specific brands they had seen as litter, days after visiting coastal areas, while 75% said they would view a brand more favourably if it supported clean-up efforts.
Already gaining momentum, brands in New Zealand including Heineken, Export and Monteithโs have invested in Reverse Media Schedules, committing a valuable financial contribution to help expand ocean clean-up efforts.

The initiative introduces a new way for brands to think about sustainability. Rather than treating clean-up as a charitable activity, it reframes it as a media investment that can help protect brand value while delivering measurable environmental impact.
Dentsu New Zealand CCO Brett Colliver says: โGood for the planet and for business. Itโs unfortunate that those two things donโt intersect more often, but thatโs why we feel that Sea Cleaners and JCDecaux have unlocked something powerful in Reverse Media Schedules. And whatโs really exciting is that itโs a
model that can be scaled around the world.โ
Connect environmental action with business models
The system also identifies hotspot locations, benchmarks brands against others in their category and estimates the value created by ongoing clean-up work.
Businesses gain access to dashboards and reporting tools that track these insights and show the impact of supporting litter removal.
Over the past 23 years, Sea Cleaners has removed more than 21 million litres of rubbish from New Zealandโs beaches and waterways, growing from a single volunteer in a kayak into a full-time operation with a fleet of ten boats.
Reverse Media Schedules is designed to help scale those efforts by connecting environmental action with a model businesses already understand.
An innovative tool
Hayden Smith, founding trustee of Sea Cleaners, says: โThe hardest part of the job isnโt picking up the litter, itโs the constant hustle required to raise funds and keep our boats in the water.
“This tool gives us a reason to talk to dozens of companies and a concrete business value that we are delivering for them.โ

John Mescall, global chief creative partner, Dentsu Creative, says: โThe responsibility for litter lies not just with the public and companies creating packaging. It also lies with us, the advertisers who help those products become so popular.
“With media, creative and data being so intimately linked within our business, dentsu is uniquely positioned to create an innovation like this and itโs a fantastic demonstration of a key dentsu philosophy, Sanpo Yoshi – good for people, good for business, good for society.”
Credits
- Clients: Sea Cleaners, JC Decaux, DB Breweries Limited
- Creative agency: Dentsu Creative Aotearoa (New Zealand)
- Media agency: Dentsu Media Aotearoa (New Zealand)
- Production company: The Post Office
- Strategic advisors: Finch
- Research & audience measurement: Nielsen
*Research from the University of Manchester found consumers are willing to spend 2% less on a product they have seen as litter. Source: Roper, S and Parker, C (2013) Doing well by doing good: a quantitative investigation of the litter effect. Journal of Business Research, 66 (11). pp. 2262-2268. ISSN 0148-2963