So add solar+wind into your jurisdiction's power mix. It's not hard to do, and progressively the diversity of power will be more stable than just relying on the coal plant which will get shut down.
EV buses allow you to wean off carbon power sources in many stages.
I don't mean to suggest that power generation modernization isn't important but... it's pretty beside the point, investing in diesel buses is locking that usage in for a great many years while an electric bus may be eventually powered by coal initially then transitioned over to an alternative energy source.
I’d argue for diesel buses because wind and solar already strain keeping the electric grid stable, except it won’t be a coal plant, it will be a natgas plant, which by itself is a huge win over diesel motors in a big city.
Centralized coal power plant outside of the densely populated areas that buses concentrate in >>>>> mobile pollution machines in those same dense areas.
Volume of coal power plant >>>> mobile pollution machines.
The 7 out of the top 10 CO2 emission sources in Europe are coal power plants. Their production is blown by the wind to populated areas. Some of coal power plant production ends up different countries as well.
