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