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