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