The assumptions annex collects the various assumptions that underpin the IEA's analysis on hydrogen. For technologies, global averages are presented. However, several analyses in the Future of Hydrogen present regional examples, for which costs will vary with material and labour inputs and differ from the global average. These input parameters reflect choices made by the IEA in light of the limited space to present multiple sensitivity analyses.

• Download assumptions annex

The project dataset covers all projects worldwide that have been commissioned since 2000 for the production of hydrogen for energy or climate change mitigation purposes, i.e. their objective is either to reduce the emissions associated with the production of hydrogen for existing applications, or the introduction of hydrogen as an energy carrier or industrial feedstock in new applications where it is not currently widely used. and has the potential to be a low-carbon technology option. Projects in planning or construction are also included.

• Access the Hydrogen Projects Database

The purpose of the policies dataset is to provide government and other stakeholders with an overview of existing policies and government activities around the world in support of hydrogen. It has been compiled by the IEA with the invaluable support of IEA Hydrogen Technology Collaboration Programme and the International Partnership for Hydrogen and Fuel Cells in the Economy. It has been undertaken to support IEA work for the G20 in 2019, but it is hoped that the collaborating organisations will be able to host it as an ongoing resource.

• Download policy dataset