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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3 December 2025
Paris climate plans (NDCs)
What are NDCs, how do they relate to the Paris Agreement – and what role do aviation and shipping play in them?
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3 December 2025
New aviation solidarity coalition on premium flyers
OG responds to new initiative to tax first- and business- class tickets, and private jets.
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3 December 2025
The International Maritime Organization and climate change
Our guide to the International Maritime Organization's role in decarbonising international shipping.
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3 December 2025
Open letter to UK Government on ECAs
OG and partners urge the UK government to expand Emissions Control Areas to all UK waters to tackle harmful shipping pollution.
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3 December 2025
Submission to the OHCHR’s UN High Commissioner for Human Rights
Can aviation and shipping taxes fund climate justice? Discover our recommendations to the UN High Commissioner.
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2 December 2025
Joint Paper: The Success of the European Green Deal
Member States must lead the "Fit for 55" transition to ensure climate action is delivered on the ground.
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2 December 2025
Including shipping and aviation emissions in Paris climate plans
Why states hold legal responsibility for international shipping and aviation emissions.
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2 December 2025
The Green Hydrogen Gap report
Sustainable shipping and aviation pathways all depend on green hydrogen, but a lack of policy is stalling investment.
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2 December 2025
Getting hydrogen right from the start
Did the EU Commission overstep its powers exempting hydrogen electrolysers from green rules? Read our analysis.
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2 December 2025
Requiring oil majors to pay
Our legal analysis shows how the EU can require fuel providers to absorb carbon costs.
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2 December 2025
Maritime freight: local and global impacts, technologies and considerations
This report charts a way towards cutting shipping emissions and improving the lives of those living closest to these trade ports.
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2 December 2025
EU policy and aviation non-CO2 impacts
Briefing on the need for EU policy to address aviation’s non-CO2 effects, such as contrails and nitrogen oxides, which significantly contribute to global warming.
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