French energy major Engie SA’s (<a href="https://live.euronext.com/en/product/equities/FR0010208488-XPAR" target="_blank">EPA:ENGI</a>) natural gas unit Geomethane has started trials for hydrogen storage in salt caverns after receiving a 350-kilogram delivery of green hydrogen from Lhyfe (<a href="https://live.euronext.com/en/product/equities/FR0014009YQ1-XPAR" target="_blank">EPA:LHYFE</a>).