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