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