Fossil fuels
Starter
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BURNING
CAPROCK
CHEMICAL
COAL
ENERGY
FIRE
FOSSILS
FUEL
HEAT
HEAT
LIGHT
OIL
PETROL
REMAINS
SMOKE
| V | Y | L | A | F | Q | F | T | C |
| B | E | O | I | O | T | R | H | A |
| U | N | R | L | S | D | E | G | P |
| R | E | T | A | S | M | M | I | R |
| N | R | E | O | I | L | A | L | O |
| I | G | P | C | L | Z | I | H | C |
| N | Y | A | U | S | M | N | E | K |
| G | L | E | K | O | M | S | A | F |
| F | U | E | L | Q | G | Z | T | L |
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