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