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