Council rates

[jtr1962]

Also, its probably already been meantioned but the ability to upgrade efficiency, either power generation or environmental protection, is far easier at a single power generation plant than at the equivalent number of moving targets.

That's another thing I neglected to mention. In general power plants will upgrade as time goes on in terms of both efficiency and emissions. ICE cars on the other hand generally get worse once they leave the factory. That goes double these days when many are struggling just to pay for fuel, never mind keeping the car decently running.