Coal Coal is a brown or black carbonaceous deposit derived from the accumulation and alteration of ancient vegetation, which originated largely in swamps or other moist environments.
(Coal Coal; is; a brown or black carbonaceous deposit derived from the accumulation and alteration of ancient vegetation,) (a brown or black carbonaceous deposit; derived; from the accumulation and alteration of ancient vegetation) (the accumulation and alteration of ancient vegetation; originated largely; L:in swamps or other moist environments)
Coal Coal a brown or black carbonaceous deposit the accumulation and alteration of ancient vegetation
is derived originated largely
a brown or black carbonaceous deposit derived from the accumulation and alteration of ancient vegetation,
from the accumulation and alteration of ancient vegetation
L:in swamps or other moist environments