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