Hopes Part 1 - A Hydrogen Sponge
One major question to resolve if we're to use hydrogen
is how to store it. Stan and Iris Ovshinsky invented a
solid metal alloy that soaks up hydrogen like a sponge.
Hopes Part 2 - Fire and Ice
Iceland is furthest along in abandoning oil for hydrogen,
thanks to its vast reserves of geothermal energy.
Hopes Part 3 - Sunshine Hydrogen
Alan checks out two ways to make hydrogen from the sun's
energy -- first using solar panels, then using sunlight
to grow algae that in turn are converted to hydrogen.