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