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