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