GEOLOGY

Detailed explanation-1: -The ranks of coal (from most to least carbon content) are as follows: anthracite, bituminous coal, sub-bituminous coal, and lignite. The coal with the highest carbon content is the best and cleanest type of coal to use.

Detailed explanation-2: -Lignite > anthracite > bituminous > peat Was this answer helpful?

Detailed explanation-3: -Hence, the correct order is: peat < lignite < bituminous coal< anthracite.

Detailed explanation-4: -Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.

Detailed explanation-5: -The ranks of coals, from those with the least carbon to those with the most carbon, are lignite, subbituminous, bituminous, and anthracite.