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