Hydrogen Economy.

It's a little before noon, and an anemic winter sun is rising slowly over the Icelandic wasteland of jagged lava rocks. Over a steaming pool of milky blue water, Bragi Arnason is talking about the future. A ruddy-faced chemistry professor with a white pompadour and a heavy maroon coat, Arnason has a staccato voice that barely rises above the hiss of steam surging up from the earth's core. For almost three decades, it has been Arnason's dream to harness this volcanic power to split the H from H2O, and create a society free of fossil fuels: the first "hydrogen economy." "I will see the first steps," says Arnason, raising a gloved hand to the horizon, where a geothermal ...