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.
fierce - violently agitated and turbulent; boisterous winds and waves; the fierce thunders roar me their music- Ezra Pound; rough weather; rough seas. boisterous, rough. stormy - (especially of weather) affected or characterized by storms or commotion; a stormy day; wide and stormy seas.