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