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