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