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