摘要

<正>Hydrogen is the lightest element in the universe and the most abundant,so on paper,hydrogen fuel has a lot going for it.Proponents (倡导者、支持者)of using hydrogen as a clean fuel think it could soon also play a vital role in decarbonising other sectors,including transport,aviation,and heavy industry.Hydrogen acts as a chemical energy carrier,rather like oil or gas,that can be piped or transported to whereit is needed.