Fossil Fuels
Introducing energy resources
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BUTANE
CHEMICAL
COAL
DIESEL
ENERGY
FOSSIL
FUEL
GAS
KEROSENE
LIQUID
ORGANIC
PARAFFIN
PEAT
PETROL
PETROLEUM
PROPANE
RENEWABLE
RESOURCE
| L | I | S | S | O | F | E | F | F | H | E |
| Y | E | E | A | U | U | N | D | V | N | K |
| X | N | L | G | P | E | E | I | X | I | E |
| O | E | I | B | E | L | S | E | L | F | C |
| R | R | Q | U | A | W | O | S | A | F | R |
| G | G | U | T | T | W | R | E | C | A | U |
| A | Y | I | A | T | J | E | L | I | R | O |
| N | T | D | N | I | T | K | N | M | A | S |
| I | M | U | E | L | O | R | T | E | P | E |
| C | O | A | L | T | G | X | E | H | R | R |
| E | N | A | P | O | R | P | G | C | Q | N |
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