A Japanese shipbuilder is leading the race to transport what some say is the eco fuel of the future. Kawasaki Heavy Industries has built the world's first vessel dedicated to carrying liquefied hydrogen.
The company says the Suiso Frontier can hold enough of the material to fill about 15,000 fuel-cell vehicles.
It's planning a test run by the end of the current fiscal year to bring liquefied hydrogen from Australia to Japan.
Hydrogen emits no carbon dioxide. The Japanese government wants to increase the country's use of it 10-fold to around 20 million tons a year by 2050.