Whether you like how we use them or not, fossil fuels are important and they have allowed humanity to technologically advance at a rapid rate. Anything important is worth understanding. if you are interested in fossil fuels you should google anything you don’t know. If you are really really interested, you should read Daniel Yergin's book "The Prize".

There are many different types of petroleum but most can be categorized as one of the three mentioned above. Likewise, there are 4 major types of coal and peat from which many coals form. Natural gas really only comes in two types (wet and dry), but knowing the difference between LNG and an NGL’s is extremely helpful given all the gas news in the media these days.