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