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