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What type of coal is the most efficient when burned as a fuel?

A. peat
B. bituminous
C. sub-bituminous
D. anthracite


Sagot :

D. Anthracite is the correct answer I’m 95% sure
Anthracite

ex: Anthracite coal is the hottest burning fuel in comparison to the most common ones in use. Environmentally cleaner than other fossil fuels. Due to its low sulfur content, Anthracite coal produces virtually no smoke or particulate emissions.