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 | W | N |
| O | H | Z | L | E | R | I | F | E |
| A | R | E | M | A | I | N | S | N |
| L | U | H | M | L | G | O | M | E |
| F | O | S | S | I | L | S | O | R |
| O | G | M | G | O | C | Y | K | G |
| L | O | R | T | E | P | A | E | Y |
| H | E | A | T | H | G | I | L | Z |
| B | U | R | N | I | N | G | P | E |
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