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