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