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