There are only two big categories: thermal and metallurgical

來源: cultuslake 於 2012-10-13 13:03:40 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (137 bytes)
回答: The bituminous and lignite are two different coals 由 sweetptt 於 2012-10-13 12:50:40

All the coal in that area is metallurgical, and all is exported.

Along the Rockies, there is a lot of coal.

 

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