Publications
Browse through our publications, from reports and briefings to insights and more.
Improving the EU aviation ETS
The EU ETS review is a rare opportunity to strengthen the aviation ETS. Here’s how the EU can use it to deliver its full potential.
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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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Filter our publications by topic, type and date.
9 September 2026
European airlines received €10.9bn in free carbon allowances
New analysis shows that free carbon allowances padded corporate profits rather than driving genuine climate investment.
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6 August 2026
States urged to protect IMO Net-Zero Framework
New proposals have been tabled that could, in effect, replace the IMO Net-Zero Framework. Opportunity Green calls on governments to protect the Framework.
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8 July 2026
Call to unlock barriers to Sail & Rail – and relieve pressure on one of Europe’s busiest air corridors
A coalition of 16 organisations are calling on the governments of the UK and Ireland to act together to improve the Sail & Rail service between the two countries.
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26 May 2026
Ireland faces legal risks over Dublin airport passenger cap lift
Ireland could face climate and human rights litigation over plans to remove Dublin Airport’s passenger cap.
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13 April 2026
Biggest global shipping companies make record profits but woefully underpay on tax
10 biggest global shipping companies record US$42.9bn profits – but pay around half global average tax rate.
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13 February 2026
NGOs urge IMO action on ammonia ship waste rules
NGOs call for a precautionary approach to managing toxic ammonia effluent from ammonia-fueled ships.
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2 February 2026
Greenwashing complaint against SGN for home heating trial
Our legal complaint about SGN’s hydrogen home heating trial.
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9 December 2025
OECD complaint filed against ArcelorMittal over climate inaction
Our legal complaint against ArcelorMittal over deceptive environmental claims.
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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 November 2025
Report calls for an end to aviation’s free pass on pollution in Ireland
Our report shows that aviation is a “glaring gap” in Ireland’s Climate Action Plan.
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9 October 2025
The IMO must champion ambition and equity in shipping climate talks
The IMO prepares for historic negotiations on the Net-Zero Framework.
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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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