Publications
Browse through our publications, from reports and briefings to insights and more.
16 organisations call for better Sail & Rail service between UK and Ireland
Discover why Opportunity Green and 15 partner organisations are calling on the UK and Irish governments to make Sail & Rail travel easier to find, book and trust.
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Loaded: the legal risks of air pollution caused by Heavy-Duty Vehicles
Diesel trucks produce a disproportionate share of deadly air pollution, exposing governments and manufacturers to growing legal and financial risks.
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The UK’s agricultural methane regulatory gap and legal risks
The UK's lack of agricultural methane rules exposes the Government to rising legal risks.
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Aviation and the EU ETS: key questions answered
As the EU is weighing extending its ETS to international flights, this FAQ explains what is at play.
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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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18 August 2026
Renewable data centres: what are the barriers?
We investigate the barriers to building AI data centres powered by completely renewable energy.
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6 August 2026
One year on: what the ICJ’s Advisory Opinion means for climate action
One year after the ICJ's Advisory Opinion, discover how this historic ruling clarified states' legal obligations and how Opportunity Green is using it to drive climate action.
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4 August 2026
5 simple fixes for Sail & Rail travel across the Irish Sea
Five ways that governments and travel operators could help travellers make the switch to Sail & Rail.
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15 June 2026
OG eyes new legal action in agriculture and heavy-duty vehicles
Legal Director David Kay reveals how OG is expanding its legal strategy into agriculture and heavy-duty vehicles.
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20 May 2026
It’s time to follow the science on aviation emissions
The EU is deciding right now whether or not to include departing flights in the ETS again. The law, economics and science are all crystally clear in favour of it. It is just the politics that are hard.
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11 May 2026
How to contact your MEP
If you want to influence EU decisions, contacting your MEP is a good place to start. This guide explains how to do it, what to write, and how to have the most impact.
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28 April 2026
Truck manufacturers’ legal intervention undermines climate commitments
Major truck manufacturers are supporting efforts to dismantle a cornerstone of US climate law, a move that could carry legal risks in the UK and EU.
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2 March 2026
How airlines can be competitive and reach climate goals
There’s a simple solution: bring back the ETS on international flights.
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2 February 2026
Will Ireland step up and become Europe’s Climate President?
Why Ireland needs to regulate data centres and aviation to meets its environmental commitments.
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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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28 October 2025
Why the aviation industry prefers an air passenger tax to a solidarity levy
A brief guide to climate tax on aviation pollution, how air travel taxes and solidarity levy differ, and why we must fairly price flying.
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16 October 2025
Don’t be fossil fooled: Say No To LNG
Pulling back the curtain on LNG's climate impact as a shipping fuel.
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