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