What sort of contribution is made to lowering the pollution output of the steam locomotive?

The personnel who control the firing of the locomotives, aptly named “Firemen,” are trained to ensure the lowest possible amount of unburnt fuel (black smoke) is released from the locomotive. During the light-up of the locomotive, when the boiler is still cold, the amount of black smoke may be more. We also mix in a variety of synthetic fuels to increase the combustibility and complete burning of our recycled oil fuel.