Coal is, in fact, formed from plant material accumulated under wetland conditions in swamps that existed millions of years ago.
(Coal; is formed; from plant material) (plant material; accumulated; L:under wetland conditions; L:in swamps) (swamps; existed; millions of years; T:ago)
Coal plant material swamps
is formed accumulated existed
from plant material
L:under wetland conditions L:in swamps
millions of years T:ago