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