one is brown, and one is black. hahaha nahh, the black coal can produce less water than the brown with the same volume therefore black coal is more efficient.
black or brown
Coal is a Brown Black sedimentary rock.
one is brown and black but one is more efficient, guess which one ;)
Black coal is an ideal fuel as it contains less water than brown coal and thus provides more energy than the same amount of brown coal.
A coal looks like this, a piece of rock that is black to brown.
They are all formed from the sedimentation of plant matter.
peat is soft and the others aren't
Coal is a hard end sedimentary rock that is brown and kind of black.
yes... yes it does. it does burn worst but coal will never be good for the environment.