Cast your mind back a decade or so ago and you'll recall how hydrogen was among a number of promising alternative fuel candidates to replace petrol, compressed natural gas, bio-diesel and even battery-electric power. For a variety of reasons, however, demand for battery electric vehicles (BEVs) has gradually increased to the point where every carmaker is investing heavily in them. Continuing just-auto/AIC's series of research snapshots, Matthew Beecham takes a look at how hydrogen can play a role as a viable fuel in the future across the automotive industry alongside BEVs.