On Feb 18, 8:06 pm, Marc Brett wrote:
On Sun, 18 Feb 2007 19:41:22 +0000, stevo wrote:
London would be foolish to go for trolley busses as hydrogen power will
be round soon(ish)

Hydrogen "power" is a fraud, the sooner abandoned the better.

http://www.thenewatlantis.com/archive/15/zubrin.htm

Fuel cells on vehicles are very energy inefficient and therefore
although they give no air borne pollutants at street level (which is
clearly much better than diesel vehicles), they are environmentally
disastrous in terms of greenhouse gas production. Economically they
are also very poor as the equipment is so heavy you cannot get
anything much larger than a medium size single decker within the gross
laden weight limits. For every one passenger kilometre on a fuel cell
bus, the same energy could give you 12 passenger kilometres on a
trolley bus. This may be improved upon a little by new developments
but it is the intrinsic physics that means there will always be a very
large disparity.