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