Our top 10 environmental campaigns of 2025
From shaping global policy, convening diverse groups, launching bold new organisations and being on the ground at key events, 2025 has been a landmark year for our work across our core sectors: food, finance, energy, transport, nature, youth, education, litigation, ocean, fashion, global business and health.
This year, we supported a diverse range of trailblazers, from Indigenous conservation networks and progressive funders to clean tech innovators and global city leaders. Together, we created bold communications that are shifting narratives and influencing key decision-makers – while securing strong, real-world, measurable impact.
Here are 10 campaigns we’re proud to celebrate, and which demonstrate what’s possible when strategy, storytelling and creativity work together to drive change.
Here are our top environmental campaigns of 2025:
- Uniting for ocean action at the UN Ocean Conference with Together for the Ocean
- Translating science into impact with the EAT-Lancet Commission
- Driving maritime decarbonisation at MEPC 83 with Global Maritime Forum
- Generating momentum for climate intelligence with Ideaonomy
- Accelerating clean industry with Build Clean Now
- Restoring coastal resilience with the National Wildlife Federation
- Turning purpose into partnerships with Company Shop Group
- Celebrating two decades of city climate leadership with C40 Cities
- Repositioning forest leadership with the Forest and Climate Leaders’ Partnership
- Reimagining school meals with the Rockefeller Foundation
1. Uniting for ocean action at the UN Ocean Conference with Together for the Ocean
With only 8% of the ocean currently protected and the 2030 deadline fast approaching, the third United Nations Ocean Conference (UNOC) in Nice marked a crucial moment for accountability. Together for the Ocean brought over 25 ocean-focused organisations together to hold governments to their 30×30 commitments, using shared messaging, data and storytelling to drive action.
What we did:
We worked with the Bloomberg Ocean Initiative and partners to deliver a multi-channel campaign that cut through the noise at UNOC. This included launching the Ocean Protection Gap Report with a high-profile press conference, running a daily press office on the ground, and coordinating over 40 media briefings. We created and distributed dynamic content across campaign and partner channels, delivered hyper-targeted paid media campaigns, and orchestrated a large-scale creative projection stunt. A unique partnership with Lime Bikes brought the campaign into the streets of Nice, with 25,000 rides tracked #ForTheOcean. Campaign ambassador Brianna Fruean represented the coalition across media and events, interviewing key stakeholders and providing narrative on all that was happening.
Results & impact:
The campaign generated more than 530 media articles, including top-tier coverage in the New York Times, The Guardian, Reuters and France24. The report launch secured 144 pieces of coverage and the campaign achieved 1.3 million social media impressions and over 50,000 engagements. UNOC saw a surge in new marine protection announcements, including the world’s largest marine protected area in French Polynesia, and brought the High Seas Treaty within ten ratifications of entering into force. Together for the Ocean was cited in 117 articles and praised by NGO leaders and policy stakeholders as a masterclass in collaborative campaign communications.
2. Translating science into impact with the EAT-Lancet Commission
The 2025 EAT-Lancet Commission Report marked a critical milestone in global efforts to transform food systems for health, nature and climate. Following the high-profile – and highly politicised – first report, the 2025 launch needed to amplify the science, neutralise expected attacks, and land a bold yet accessible narrative in media worldwide.
What we did:
We led the global communications strategy for the report, developing a robust media narrative anchored in the science and stress-tested through extensive stakeholder engagement. We produced a suite of tailored media materials, delivered spokesperson training for Commissioners, and ran high-impact journalist outreach and press briefings. Three Greenhouse team members travelled to Stockholm to support the report’s launch at the Stockholm Food Forum, providing on-the-ground support for the press conference and interviews.
Results & impact:
The campaign generated more than 4,500 pieces of media coverage across 40 languages and 88 countries, including 12 interviews with top-tier outlets. Over 40 journalists attended the press briefing, and the narrative landed strongly across global opinion pages and even TikTok. Feedback from Commissioners and EAT staff was overwhelmingly positive – not least the “several hugs” shared with Greenhouse team members by relieved and energised scientists.
3. Driving maritime decarbonisation at MEPC 83 with Global Maritime Forum
In April 2025, the International Maritime Organization (IMO) convened for MEPC 83 – a pivotal moment in the future of global shipping. At stake was a vote on the Net-Zero Framework, the world’s first sector-wide carbon levy, designed to fund a just transition to net zero shipping by 2050. With competing interests and geopolitical shifts, the Global Maritime Forum needed to cut through a crowded, complex space to influence outcomes and shape the narrative.
What we did:
We delivered a three-phase communications campaign designed to build awareness of the negotiations, raise the profile of the Global Maritime Forum as go-to experts and build readiness for media engagement across the entire negotiation window. Ahead of MEPC 83, we ran a month-long media education programme to brief top-tier journalists on the stakes and significance of the vote. During negotiations, we delivered regular media briefings, pre-prepared media statements and real-time analysis. Post-event, we led an in-person media masterclass to contextualise outcomes and drive ongoing coverage and engagement – attendees included Forbes, Politico, and Carbon Pulse.
Results & impact:
The campaign secured over 100 pieces of global media coverage and an estimated 17.2 million views, with a total reach of 4.74 billion. Global Maritime Forum spokespeople participated in eight top tier media interviews, and over 10 journalists attended the in-person post-MEPC event. The work successfully positioned GMF at the heart of the debate – elevating shipping on the global climate agenda and supporting a more equitable and ambitious policy outcome.
4. Generating momentum for climate intelligence with Ideaonomy
As climate and innovation challenges grow more complex, so too does the need for smarter collaboration across sectors. Ideaonomy is a platform built to meet that need – helping leaders connect ideas, people and solutions across boundaries. Its lead generation campaign set out to grow awareness and convert interest into meaningful platform engagement.
What we did:
We delivered a two-phase LinkedIn campaign focused on testing and scaling the most effective tactics. In Phase 2, we refined messaging and creative to spotlight relatable problems, social proof and the platform’s unique ‘nature-inspired’ positioning. We used a mix of direct message ads, static lead forms and thought leadership to drive qualified leads and brand visibility. By anchoring the campaign in founder-led storytelling and clear, credible messaging, we created cut-through in a competitive digital space.
Results & impact:
The campaign exceeded targets across all key metrics. It generated 88 high quality new leads in four weeks – more than 250% of the target – and delivered 136,000 views and 3,200 engagements with key stakeholders. Direct message ads performed best, delivering leads at a cost-per-acquisition (CPA) three times lower than expected. The campaign also validated in-platform LinkedIn forms as the strongest conversion route, offering clear learnings to guide future growth.
5. Accelerating clean industry with Build Clean Now
Heavy industry is responsible for nearly 30% of global emissions, yet clean industrial projects remain underfunded and under-recognised. Launched by the Industrial Transition Accelerator, Build Clean Now set out to close the gap between ambition and action – positioning clean industry as a core solution for the net-zero transition and economic development.
What we did:
We developed a bold campaign concept and a compelling new brand to reframe clean industry as an opportunity. This included a unifying narrative and messaging platform, a dynamic landing page, and high-impact animations and toolkits to drive amplification. We coordinated a high-profile launch dinner featuring Vijay Vaitheeswaran of The Economist, and delivered a strategic media programme to build momentum ahead of Climate Week NYC.
Results & impact:
The campaign reached over 5 million people in a hyper-targeted audience. The digital platform drew 3,000+ landing page sessions, with 240,000 video views across social channels. Crucially, the campaign narrative was echoed by UN Climate Change Executive Secretary Simon Stiell during Climate Week, amplifying visibility and stakeholder alignment. This helped cement clean industry as a central pillar of global climate and economic strategy.
6. Restoring coastal resilience with the National Wildlife Federation
Offshore wind plays a vital role in the clean energy transition, but misinformation and polarisation in the US threaten to slow progress. To shift the narrative, the National Wildlife Federation partnered with Greenhouse to produce a documentary that speaks to shared values – showing how offshore wind can work in harmony with wildlife, communities and local environments.
What we did:
We led end-to-end development of the documentary Coast to Coast – from research and narrative strategy through to production and paid media rollout. Grounded in insights into misinformation and public sentiment, the film featured voices from three US coastal regions and focused on community storytelling over top-down messaging. We created spokesperson scripts, ran on-location filming, and delivered multiple cuts optimised for media, education and advocacy channels.
Results & impact:
Launched in October 2025, the film became one of the National Wildlife Federation’s most-viewed videos. It was launched via screenings all over the US and an integrated digital campaign, generating important dialogue around responsible offshore wind. Paid media campaigns drove over 2 million impressions across the East, Gulf and West Coasts, while the film helped position NWF as a leader in the renewable energy conversation. One politician in Florida cited that it had changed his opinion on what offshore wind offered and how it could provide a viable energy solution as well as a boost for local communities.
7. Turning purpose into partnerships with Company Shop Group
Surplus products are often seen as waste, but Company Shop Group is working to reframe them as valuable resources that can deliver social, environmental and financial impact. To engage major retailers and manufacturers with this vision, we developed The Surplus Solution – a strategic account-based marketing (ABM) campaign designed to spark conversations and generate qualified leads.
What we did:
We built a sector-specific creative platform from the ground up, including a refreshed identity, new messaging framework and campaign concept. This was brought to life through tailored landing pages, a quiz-style Surplus Impact Calculator, hero films, testimonial assets and email nurture flows. We also delivered a targeted paid media campaign across LinkedIn and Google Ads, supported by organic thought leadership from Company Shop Group’s leadership team.
Results & impact:
The campaign generated 44 leads with global brands and suppliers – 26% above target. Cost per lead was 30% below target, and the calculator tool alone drove nearly 40% of all conversions. Paid channels delivered 93% of results, validating the media strategy, and the content laid a strong foundation for future outreach. Internally, the campaign was seen as a proof of concept for how ABM can scale both brand value and business outcomes.
8. Celebrating two decades of city climate leadership with C40 Cities
As C40 marked its 20th anniversary, 2025 presented a unique opportunity to bring clarity and cohesion to the network’s story – and to showcase the leadership of cities on the frontline of the climate crisis. Spanning three flagship moments across the year, the campaign aimed to reposition C40 as a bold, collaborative force driving global progress.
What we did:
We created a unifying brand and year-long communications platform for C40, aligning its history with a forward-looking message of ambition and action. This included the C40 at 20 sub-brand, a powerful 200-page publication translated into four languages, a hero campaign film, and creative development for a keynote speech at the World Mayors Summit. We also produced a wearable COP30 publication – a lanyard booklet designed to increase visibility and cut through at a busy international event.
Results & impact:
The campaign reached over 100 mayors and hundreds more stakeholders at the World Mayors Summit, both in person and via livestream. The hero film generated 3,500 views and the C40 at 20 publication provided a highly visible anchor for the organisation’s anniversary story. Feedback from across the C40 network was overwhelmingly positive, with stakeholders praising the clarity, creativity and cohesion of the campaign. The result was a stronger, more unified presence at a critical moment for multilateral climate action.
9. Repositioning forest leadership with the Forest and Climate Leaders’ Partnership
As one of the world’s largest alliances for forest action, the Forest and Climate Leaders’ Partnership (FCLP) unites 34 governments committed to halting forest loss. But in 2025, it became clear that the platform’s communications were holding it back. With an outdated website and fragmented messaging, FCLP risked losing traction at key global moments. A full overhaul was needed to bring credibility, clarity and unity to its story.
What we did:
We delivered a strategic communications transformation for FCLP, creating a professional new brand and website with an asset library, templates and updated tone. We developed a shared narrative and set of key messages, built through extensive consultation across five workstreams. We also led targeted media engagement around Climate Week NYC and COP30, and supported members with media briefings, blogs and thought leadership content on forest financing and land tenure.
Results & impact:
The campaign delivered over 190 pieces of coverage across 28 countries and more than 35,000 organic impressions on LinkedIn during COP30. FCLP’s LinkedIn following doubled, and 10+ high-profile interviews were secured. The new narrative helped unify messaging across governments and was widely adopted.]
10. Reimagining school meals with the Rockefeller Foundation
Global food systems are a leading driver of environmental degradation, accounting for over a third of greenhouse gas emissions and contributing significantly to deforestation and biodiversity loss. At the same time, 153 million children and young people go to bed hungry every night. School meal programs are one of the world’s most important social safety nets, reaching 418 million children daily, offering significant long-term health and education benefits. But their impact can go much further. By embedding regenerative principles, such as enhancing soil health, supporting biodiversity, and improving farmer livelihoods into school meal programs, governments can transform a critical public service into a strategic market lever for national development, climate resilience, and nutrition security future-fit for a climate-vulnerable world.
What we did:
We supported the Rockefeller Foundation to develop a series of global convenings, bringing together partners from NGOs, policymakers, philanthropic and the private sector to recognise the role regenerative agriculture can play in making school meal programmes even more impactful. We supported with messaging, visual design and content as well as event design, speaker briefings and event collateral at a signature convening in Ethiopia, at Climate Week NYC and at COP30.
Results & impact:
The signature convening in Addis Ababa on the eve of the UN Food Systems Summit in July 2025 featured the First Lady of Kenya, Rachel Ruto and Former Prime Minister of Ethiopia Hailemariam Desalegn as well as 180 leaders from a variety of sectors. 98% of attendees were inspired to take meaningful action on the agenda and 100% agreed that they made meaningful new contacts during the convening. At Climate Week NYC we saw governments from Brazil, France and Somalia call on other countries to Integrate Regenerative School Meals into National Climate Plans.
From global summits to grassroots storytelling, the campaigns we delivered in 2025 demonstrate the power of communications to accelerate climate solutions, elevate unheard voices and shift narratives at scale. As we head into a decisive year for nature and climate, we remain focused on delivering strategic, ambitious, creative and impactful work that drives systems change and builds a more just, resilient future.
Connect with us to amplify your impact:
