A European consortium said it had in a world-first successfully tested a gas turbine fully powered by hydrogen, opening the way to slash carbon emissions in energy-intensive industries like cement. Hydrogen has been touted as a potential alternative to polluting fossil fuels that are responsible for greenhouse gas emissions. But technical challenges, high costs and a lack of infrastructure have hampered its development. Frank Lacroix the vice president of French energy company Engie said the experiment used a Siemens Energy SGT-400 gas turbine whose combustion system was adapted for hydrogen, to produce electricity.