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