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