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