A look at surface and subsurface mining methods as well as their environmental impacts.
UNDER GROUND COAL GASSIFICATION PROCESS THAT CONVERT COAL SOLID TO GASSEOUS STATE.
Hoang Anh, Viet Cuongpresented in Sustainable Energy Development Seminar in Hanoi (November, 2011)
Coal Facts is the West Virginia Coal Association's annual statistical publication.
Janet Gellici's October 6th presentation on coal.
Comparative coal mining operations costs and investor report