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