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