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
| F | U | E | L | C | V | E | E | X | K | S |
| L | E | S | E | I | D | N | N | M | E | L |
| Y | P | L | E | G | C | E | A | U | N | L |
| F | E | C | B | A | Z | S | P | E | A | I |
| O | A | O | S | A | G | O | O | L | T | Q |
| S | T | R | B | B | W | R | R | O | U | U |
| S | Y | G | R | E | N | E | P | R | B | I |
| I | L | A | O | C | A | K | N | T | G | D |
| L | L | N | L | A | C | I | M | E | H | C |
| R | N | I | F | F | A | R | A | P | R | E |
| X | Q | C | R | E | S | O | U | R | C | E |
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