Smokeless coal
Smokeless coal is a category of coal and coal-derived fuels valued for their low visible smoke output when burned, making them desirable for domestic heating and certain industrial processes where…
Lean coal
This article explores the technical, economic and geopolitical dimensions of what is commonly referred to as “lean coal” — lower-energy, lower-volatile types of coal often used for power generation rather…
Sub-bituminous coal
Sub-bituminous coal is an intermediate rank of coal that bridges the gap between lignite and bituminous coal. It plays a crucial role in modern energy systems, particularly in power generation,…
