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