Released in April 2016, this NASA report explores hydrogen embrittlement, which is a decrease in the toughness of a metal caused by exposure to hydrogen or gases containing hydrogen, such as hydrogen sulfide.

The World Energy Outlook explores different scenarios based on assumptions, such as no changes in energy policy, and projects outcomes for each of those scenarios. 

This NREL report published in 2013 analyzes the implications of blending hydrogen into natural gas systems, from distribution to end use.

G20 commissioned IEA to produce this report published in June 2019. It assesses the viability of hydrogen in reducing greenhouse gas emissions and outlines the policies needed to drive wider adoption of it.

As a part of investigating hydrogen blend effects on appliances, the Northwest Energy Efficiency Alliance partnered with Cadeo Group to provide next steps on achieving appliance readiness for hydrogen blends.

Due to regulations of reducing carbon dioxide emissions, the KIWA group developed a report to explain how the United Kingdom’s efforts to meet international regulations will influence “gas-fired equipment”. 

The Canadian Standards Association conducted testing to determine performance of up to 15% hydrogen-natural gas blends on space and water heaters. Overall, the study showed that hydrogen blends do not affect appliances of up to 15% and ultimately produce lower carbon emissions.

The Department for Business, Energy and Industrial Strategy with the United Kingdom government utilized Frazer-Nash Consultancy to investigate the feasibility of developing appliances to be used with 100% hydrogen.