In message , David Bradley
writes
On Sun, 6 Nov 2005 17:31:23 +0000, Clive wrote:

In message , David Bradley
writes
Then I am one ofthe few because there is no such thing as a clean
diesel, only a less dirty one. Progress would have been served if the
route had been electrified with zero polluting,
Such a thing doesn't yet exist.

Please explain further. In my book a trolleybus IS zero polluting.

David Bradley

Not only do trolley buses pollute, (carbon from motor brushes asbestos
from brake pads etc.) but there is also the pollution from the source of
the traction current supplied.
--
Clive