They're going to have to fit speakers to them to simulate engine sounds apparently rubberduck!
Lots of blind lobby groups especially protesting against the fact they're silent, as blind people can't hear them coming.

The problem is nobody's come up with a realistic alternative yet. Extracting hydrogen from water requires massive amounts of energy as PJM rightly points out, and Li-ion batteries aren't really suitable either as we're also getting to the end of the world's easily obtainable lithium deposits.

Battery technology is what's holding a lot of things back; lithium batteries are over 30 years old now and nobody's invented an alternative. Like it or lump it, I think a lot of the solution is just going to have to be for people to drive less.

Except that would require a public transport system that actually works. Which would mean massive tax subsidies like they have in Europe, which means the British public will never vote it in. Thanks Margaret & Tony for flogging it all off to the highest bidders, it's now a lose/lose situation.
(Son of Sam-i-am We're all as mad as hatters here, Tue 23 Dec 2008, 11:14, Reply)