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