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