Lignite

Different Types of Coal

Different Types of Coal
Coal is a combustible organic rock which is primarily made of carbon, nitrogen and oxygen. It is mainly classified into different ranks or grades, based on the percentage of carbon in it.

Most Searched in Cars and Transportation Most Searched in Pregnancy and Parenting
Most Searched in Health Most Searched in Food and Drink
American Accent vs British Accent
Ice vs Dry Ice
Different Types of Ram
Sony Xperia J vs Micromax A116 Canvas HD