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