Sentence:  the magnitude of effort and costs of each of these possible phases of an effective safety program for metal and nonmetallic mines ( excluding <WSD>coal</WSD> and lignite mines ) ; and the scope and adequacy of State mine safety laws applicable to such mines and the enforcement of such laws . 
Meaning of the word marked with <WSD> tags:  fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period