Publications
Browse through our publications, from reports and briefings to insights and more.
Heading into the EU Taxonomy hearing: what to expect
Ahead of our hearing, this FAQ explains why we’re facing the European Commission in court and what’s at stake for the EU Taxonomy.
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Home heating trial risks misleading consumers
Our legal complaint to the CMA, outlining why SGN’s hydrogen heating claims constitute greenwashing and risk delaying the transition to genuine low-carbon heat.
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Data centres must be included in UK’s decarbonisation plans
Briefing calling for mandatory decarbonisation plans for UK data centres to ensure the sector’s rapid growth is compatible with national climate commitments.
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OECD complaint against ArcelorMittal
Legal complaint challenging ArcelorMittal’s green steel claims, highlighting the urgent need for corporate transparency and truthful environmental advertising.
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Closing Ireland’s aviation climate gap
This report examines how Ireland can place climate action at the heart of its leadership while generating significant revenue through introducing a fair air travel levy and expanding the EU Emissions Trading System (EU ETS) to include international flights.
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1 October 2025
Avoiding contrails: options for international cooperation
Explore the legal frameworks and international agreements needed to scale contrail avoidance now.
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1 October 2025
Airport capacity and climate: legal clarity under EU slot rules
Our legal briefing confirms that slot coordinators can limit capacity for environmental reasons and that airlines have no proprietary rights to historic slots.
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1 October 2025
Air pollution in ports: a human rights issue
Why port pollution is a climate, health and human rights issue today.
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1 October 2025
Open letter to cruise ticket sellers
Opportunity Green challenges misleading “eco‑friendly” ads for fossil LNG‑powered cruises in UK.
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22 September 2025
The International Civil Aviation Organization (ICAO) assembly
The ICAO Assembly is an opportunity for aviation to change course on climate change.
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16 September 2025
Data centres’ growing environmental challenge: mapping the global regulatory response
Track emerging regulations shaping data centres’ energy use, sustainability and climate impact across OECD countries.
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3 September 2025
ASA rules green claims about LNG on MSC Cruises are likely to mislead
Cruise ticket sellers found to breach advertising rules with misleading LNG adverts.
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1 September 2025
Legal obligations on equitably decarbonising international aviation
Discover the policy changes needed at the 2025 ICAO Assembly to align flight emissions with global climate law.
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1 September 2025
How does agribusiness contribute to global heating?
Agriculture is a major driver of methane and nitrous oxide emissions. Legal action is rising to fill the policy gap. Discover the growing climate litigation risks for agribusinesses.
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1 September 2025
Mitigating tourism impacts from a global aviation levy
How smart policy design can protect SIDS and LDCs while raising vital climate finance.
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1 September 2025
Data centre environmental regulations tracker – OECD policy tracker
A live tracker mapping OECD countries' policies regulating data centres' environmental impacts.
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16 July 2025
World’s highest court, ICJ, says all states must act to protect the climate
The ICJ clarifies states' international legal obligations to act to prevent climate change.
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