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