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