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