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