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