Why is low ash, low Sulfur coal such as LV brown coal to BCE...

Why is low ash, low Sulfur coal such as LV brown coal to BCE more attractive than other high ash high Sulfur coal?

"" Carbon policies also shift demand within the coal sector, away from brown coal and low quality black coal towards higher quality black coal.

So while in general there will not be great prospects for opening new coal mines, in some circumstances expansion of high-quality coal mining could be part of an efficient transition. ""

Turning low quality brown coal into a BCE just creates low quality black coal equivalent that still highly pollutes the atmosphere when burnt.

High quality brown coal as found in the LV results in a high quality BCE.

B Rubes