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