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