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