Coal (coal) is a type of sedimentary rock, which can ignite, which is an important component, is a compound of carbon, which is about 50 percent, at least by weight, or 70 percent.Can ignite.
Coal (coal) is a type of sedimentary rock which can be flammable, which is a key component. Carbon Compounds It is estimated at least 50 percent by weight or percentage. 70 flammable
Coal (coal) is a kind of sedimentary rock which can ignite which contains important is compound of carbon, which is approximately less than percent by weight or 50 percent. 70 can ignite.