Coal as a fuel
Bituminous coal is a solid mineral fuel. It is a sedimentary rock formed from dead plants, mainly during the Carboniferous period, around 360-300 million years ago – in the Palaeozoic era. Over time, with heat and pressure, the dead plant material wa [...]
 
             
    
 
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                 
                                                 
                                                 
                                                 
                                                 
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                            