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