[1/3] A general view of hydrogen electrolysis plant called 'REFHYNE', one of the world's first green hydrogen plants, during a launch event at Shell's Rhineland refinery in Wesseling near Cologne, Germany, July 2, 2021. REUTERS/Thilo SchmuelgenLONDON, Dec 22 (Reuters) - The green hydrogen express is gathering pace, but it may have a worrying problem with leaks. At least four studies published this year say hydrogen loses its environmental edge when it seeps into the atmosphere. The United States included billions of dollars of green hydrogen tax credits in its Inflation Reduction Act and the European Union approved 5.2 billion euros ($5.5 billion) in subsidies for green hydrogen projects in September. While potential leakages of hydrogen are not expected to be on a scale that could derail all green hydrogen plans, any seepage would erode its climate benefits, they say.

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