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