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