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