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