Urgent! Object to the scrapping of the congestion charge extension

By the nature of the journeys diesel bus (don't know about the hydrogen ones) and taxi engine are used in stop start driving conditions for many hours a day. Hence produce more than a car say running for its two hour commute.
Also engines are at their most efficient at constant revs and with movement (so energy converted to motion and not lost with the vehicle sitting still.

That's nice. It is also irrelevant.
The figures you want to read are up the thread somewhere.
A bus transports many hundreds/thousands of people around all day. A car? Fuck all.
Since there exist bus lanes, buses and taxis most likely stop/start less than a car in traffic.