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 | L | T |
| Y | H | R | H | E | A | T | D | E |
| P | Y | E | Q | S | B | T | K | B |
| E | G | M | M | L | I | O | T | U |
| T | R | A | Y | I | M | E | H | R |
| R | E | I | Z | S | C | F | G | N |
| O | N | N | F | S | O | A | I | I |
| L | E | S | E | O | A | J | L | N |
| Z | L | E | U | F | L | F | G | G |
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