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