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