High-moisture coal
High-moisture coal is a broad category of low-rank coals that contain a significantly higher share of water in their natural state than medium- and high-rank coals. These coals play an…
High-sulfur coal
High-sulfur coal is a distinctive and consequential category of fossil fuel whose chemical makeup, geographic distribution and economic implications have shaped energy systems, industrial processes and environmental policy for more…
Sub-bituminous C
Sub-bituminous C is a specific rank of coal that plays a quiet but important role in global energy systems. Positioned between lignite and higher-rank bituminous coals, sub-bituminous C combines relatively…
Sub-bituminous B
Sub-bituminous B coal is a low- to medium-rank thermal coal that plays an important role in contemporary energy systems, particularly for power generation. It sits between lignite and bituminous coal…
The History of Coal: From the Industrial Revolution to Today
The story of coal weaves through centuries of human endeavor, fueling revolutions and shaping landscapes. Its journey from a rudimentary heat source to a cornerstone of global energy systems reflects…
Thermal coal
Thermal coal, commonly known as steam coal, is one of the most important fossil fuels in modern energy systems. It is primarily used to generate electricity and as a heat…






