Sign up to our newsletter (by signing up, you agree to our privacy policy)

About us
- - - About us
- - - Who we are
    - Read about our story, culture & values
    - Our team
    - Meet our experts
    - Opportunity Green Europe
    - Find out about our European office in Brussels
  - - Work with us
    - Learn about our current vacancies and how to apply
    - What we offer
    - The benefits of working at OG
    - Equity, diversity & inclusion
    - OG’s diverse & inclusive workplace
  - - Press office
    - How we work with the media
    - Contact us
  - - Want to work for us?
      
      We’re a rapidly growing organisation looking for people who are as passionate about solving the climate crisis as we are.
      
      View careers
- - - Want to work for us?
      
      We’re a rapidly growing organisation looking for people who are as passionate about solving the climate crisis as we are.
      
      View careers
Our work
- - - Our work
- - - What we do
    - Read about OG’s strategic approach
    - SASHA Coalition
    - Our coalition of shipping and aviation companies
  - - Support our work
      
      Help us make a bigger impact in tackling the gaps that others often miss.
      
      Support us
- - - Want to work for us?
      
      We’re a rapidly growing organisation looking for people who are as passionate about solving the climate crisis as we are.
      
      View careers
Our impact
- - - Our impact
- - - Media coverage
    - OG in news, articles and broadcast
    - Annual reports
    - Discover our impact, key moments and future plans
  - - Support our work
      
      Help us make a bigger impact in tackling the gaps that others often miss.
      
      Support us
- - - Support our work
      
      Help us make a bigger impact in tackling the gaps that others often miss.
      
      Support us
Publications

Briefings

Explore all our briefings.

Briefings

Cargo ship

Shipping

Tacit vs. explicit acceptance: the IMO’s Net-Zero Framework

Tacit or explicit acceptance could determine whether the IMO’s Net-Zero Framework enters…

A row of aeroplanes with orange and white rudders waiting at a European airport

Aviation

Legal powers to regulate international aviation under the EU ETS

Legal analysis of the EU’s authority to regulate all international aviation emissions…

The European Union flag - bright blue with a circle of yellow stars - fluttering in the breeze

Climate law

Joint Paper: The Success of the European Green Deal

Member States must lead the "Fit for 55" transition to ensure climate…

A pile of 50 Euro notes

Aviation

Legal risks of the EU’s tax giveaway to airlines

Current fuel tax exemptions may violate state aid rules and the UK-EU…

A colourful freight ship in the sea

Shipping

Adjournment of the IMO’s Net-Zero Framework

IMO’s Net-Zero Framework is delayed, but ambition, timelines, and equity remain negotiable.

Aeroplane issuing contrails across a deep blue sky

Aviation

Avoiding contrails: options for international cooperation

Explore the legal frameworks and international agreements needed to scale contrail avoidance…

Close up view of an aeroplane, its wings and propellers

Aviation

Airport capacity and climate: legal clarity under EU slot rules

Our legal briefing confirms that slot coordinators can limit capacity for environmental…

A line of world flags in a row

Climate law

Legal obligations on equitably decarbonising international aviation

Discover the policy changes needed at the 2025 ICAO Assembly to align…

Freight ship at sea alongside a smaller shipping vessel

Alternative fuels

Ammonia as shipping fuel: benefits, risks and policy solutions

In this briefing we ask, how can we avoid swapping one pollution…

1 2 Next