Fossil fuels consist of deposits of once living organisms. The organic matter takes centuries to form. Fossil fuels principally consist of carbon and hydrogen bonds. There are three types of fossil fuels which can all be used for energy provision; coal, oil and natural gas. Coal is a solid fossil fuel formed over millions of years by decay of land vegetation. When layers are compacted and heated over time, deposits are turned into coal.
extreme (comparative extremer or more extreme, superlative extremest or most extreme) 1  Of a place, the most remote, farthest or outermost. At the extreme edges, the coating is very thin.â. 2  In the greatest or highest degree; intense.
intransitive. 1  To flame up with a bright, wavering light. 2  To burst into intense, sudden flame. 3  a. To erupt or intensify suddenly: Tempers flared at the meeting. 4  To expand or open outward in shape: a skirt that flares from the waist; nostrils that flared with anger.