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