World's first road-ready hydrogen fuel cell-powered motorcycle

From British-based Intelligent Energy, it's called the ENV, for Emissions Neutral Vehicle.

Highlights:

• Silent

• Street legal

• Emissions consist of pure water

• Single gear — no clutching or shifting

• Super-light — 176 lbs. (including removable fuel cell), about half the weight of a typical bike this size

Lowlights:

• Silent

• 50 mph top speed

Production and retail sale are scheduled to begin in late 2007.