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