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