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