The Green Hydrogen Organisation (GH2)

The Green Hydrogen Standard

Download the Green Hydrogen Standard 2.0

Hydrogen projects that meet the Green Hydrogen Standard will be licensed to use the label “GH2 Green Hydrogen” and will be eligible to obtain and trade GH2 certificates of origin for green hydrogen and derivatives such as green ammonia

The Green Hydrogen Organisation (GH2)

The Green Hydrogen Organisation (GH2) is a not profit foundation under Swiss law. In addition to its office in Geneva it is present in London, Perth, and Sydney.

The mission of GH2 is to dramatically accelerate the production and utilisation of green hydrogen across a range of sectors globally. It will push to rapidly decarbonise industries like steel, cement, fertilisers, shipping and aviation that have so far made limited progress reducing their emissions.

A global standard that defines green hydrogen is essential to promote confidence, raise and leverage investment, facilitate trade and unlock green hydrogen’s vast potential. 

Additional information regarding GH2 is available via

The Green Hydrogen Standard

The Green Hydrogen Organisation

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Unlocking Green Hydrogen’s vast potential

The central importance of green hydrogen in the transition to net zero is clearer than ever. Every week brings another wave of green hydrogen announcements: new national strategies, government incentives, industry commitments and collaboration, research insights and advocacy.

We have stopped debating if green hydrogen is a solution. The question is how quickly we can make it happen.

As a fuel, when hydrogen is used its only emission is water (H20). But if all forms of hydrogen are zero emission when used, they are definitely not when produced.

It is essential therefore that we reach agreement on global standards that define green hydrogen. This is not just a technical issue. Everyone needs to know that “green” hydrogen means hydrogen produced without significant associated greenhouse gas emission. This is in contrast to most of the hydrogen used today which is made from methane by processes that typically result in more than ten kilos of CO2 emissions for each kilo of hydrogen.

There is a growing appreciation that green hydrogen is the only hydrogen production option strictly aligned with a 1.5-degree pathway.

However, even among supporters of green hydrogen, there are different views about how to define renewable electricity, how to measure emissions, and what, if any, sustainability criteria should apply. Green hydrogen and green hydrogen derivatives will be globally traded commodities. A standard is needed to build trust and confidence between investors, producers, customers and consumers. We also need a social license to operate from the communities that will host green hydrogen production. There are clear risks that, if not managed to a high standard, the green hydrogen revolution will stall.

It is for these reasons we have developed and agreed this Standard, the Green Hydrogen Standard. It establishes a global definition of green hydrogen: Green hydrogen is hydrogen produced through the electrolysis of water with 100% or near 100% renewable energy with close to zero greenhouse gas emissions. We invite green hydrogen producers to have their project independently accredited by GH2. Projects that meet the Standard, as set out below, will be licensed by GH2’s accreditation body to use the label “GH2 Green Hydrogen” and will be eligible to obtain and trade GH2 certificates of origin.

Green hydrogen is sometimes characterised as having zero greenhouse gas emissions. However, the production of renewable electricity can involve some greenhouse gas emissions. There can be greenhouse gas emissions associated with green hydrogen production and associated processes (such as water treatment and desalination). And some projects have non-renewable back-up power systems. Accordingly, GH2 refers to “close to zero greenhouse gas emissions”. The Standard requires that green hydrogen projects operate at <=1 kg CO2e per kg H2 (taken as an average over a 12-month period).

This revised edition of the Standard also includes the Green Ammonia Protocol. The majority of export-oriented green hydrogen projects plan to ship ammonia. Ammonia is preferred for three reasons: its energy density; its proven synthesis technology and existing supply chains; and its potential to drive decarbonisation in its own right. As with green hydrogen, a clear definition of green ammonia is needed. The Protocol expects green ammonia projects to operate at <=.3 kg CO2e per kg NH3 (taken as an average over a 12-month period).

In both cases, GH2 will review the performance of GH2 accredited projects on an annual basis, with the expectation that the boundaries of the emissions assessment framework can be widened and that the emissions threshold will be lowered in accordance with emerging best practice. GH2 will also extend this work to other green hydrogen derivatives.

GH2’s definition of renewable energy is based on the technologies that are the leading candidates for scaling up green hydrogen production: hydropower, wind, solar, geothermal, tidal and other ocean energy sources. Some countries believe that there is a role for nuclear energy to accelerate the shift from more polluting activities, such as coal generation. However, nuclear power has environmental and safety related issues which this Standard is not designed to address. Similarly, there are sustainability issues related to biomass and waste to energy that require careful scrutiny. GH2 welcomes the Green Hydrogen Standard inspiring further rules and standards for nuclear and other forms of energy production with close to zero emissions.

The Standard requires that the environmental, social and governance aspects of green hydrogen production are addressed. It requires that the development opportunities and impacts of green hydrogen production and use are considered. These are vital considerations for investors, customers, consumers and the communities that host green hydrogen projects.

GH2 has been established to build the energy systems of the future. Green hydrogen is a vastly superior technology to fossil fuels and will inevitably replace them. The only question is when, and we are running out of time. If you are committed to the energy transition, reach out to us here at GH2. We have a planet to save and no time to waste.

Malcolm Turnbull

Chairman of the Green Hydrogen Organisation



In December 2021 the GH2 formed a Technical Committee to advise the GH2 Board on the development of the Standard. GH2 thanks the following Committee members for their advice and input:

  • Anna Freeman, Clean Energy Council Australia.
  • Barbara Jinks, IRENA
  • Emile Herben, Yara
  • Gökçe Mete, Stockholm Environment Institute
  • Heino von Meyer, PtX Hub
  • Ilka-Rose Mitchell, Fortescue Future Industries
  • Jill Thesen, The Federation of German Industries e.V. (BDI)
  • Johanna Friese, PtX Hub
  • Linda Wright, New Zealand Hydrogen Council
  • Liu Yunhui, Research Center for Contemporary Management, Tsinghua University
  • Marcelo Kloster, Argentinean Accreditation Organization
  • Noam Boussidan, World Economic Forum
  • Mark Phillips, Nikau Capital
  • Miguelangel Ocando Wahban, H2Vector Energy Technologies, S.L.
  • Noel Tomnay, Wood Mackenzie.
  • Rachel Fakhry, Natural Resources Defense Council
  • Rita Tedesco, ECOS
  • Scott Hamilton, Smart Energy Council (Australia)
  • Simon Dawes, Carbon Change Australia
  • Sonja Butzengeiger-Geyer, Perspectives Climate Group GmbH
  • Tom Parkinson, Fortescue Future Industries
  • Tim Hard, Argus

While these contributions are greatly appreciated, responsibility for the Standard rests with the Green Hydrogen Organisation (GH2), Geneva, Switzerland.

Version History

The first edition (version 1.0) of the Green Hydrogen Standard was published in May 2022. An updated version (1.1) was published in January 2023, including the Green Ammonia Protocol. The second version (2.0) was published in November 2023, including the Green Methanol and Synthetic Methane Protocol.