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