Fewer vehicles would be more efficient, MIT argues.
London could still be saved from the smog that constantly plagues the European Union's most sizable urban area.
The UK's Black Cab is truly iconic. Though typically painted black, some of the UK's symbolic cabs have taken on a shade of green. Not literally, but figuratively.
Volkswagen Milano Taxi concept – Click above for high-res image gallery
Click above for a larger image of the Enzo cab