What are the disadvantages of coal? | ReferenceThe primary disadvantages of coal stem from its adverse health and environmental effects. Burning coal produces harmful waste, including carbon dioxide,.what are the disadvantages of coal,9 Most Valid Advantages and Disadvantages of Coal | ConnectUSMay 27, 2015 . Coal is a sedimentary organic rock that is highly combustible. It is composed mainly of carbon oxygen and hydrogen, making it a primary.