The future of personal transport is either pedal power or electric. Hydrogen needs electricity for extraction, so it is made less efficient because it needs another energy transformation; Bio-fuel takes away valuable crop land; ethanol needs vast quantaties of green waste that we just don't have; so the only remaining solutions are electric (efficient if taken from a renewable source) and human power (not necessarily fast, but ultra green and keeps you fit).
Refuse, reduce, repair, reuse, rot, recycle Daleks rock!!!
Life on Earth is too important for people to believe Jeremy Clarkson's opinions.