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