German energy group RWE AG (<a href="https://www.boerse-frankfurt.de/equity/rwe-ag-st" target="_blank">ETR:RWE</a>) has agreed to supply 30,000 tonnes of green hydrogen annually to TotalEnergies SE’s (<a href="https://live.euronext.com/en/product/equities/FR0000120271-XPAR" target="_blank">EPA:TTE</a>) Leuna refinery in Germany, helping to decarbonise the site.