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 | H | B |
| V | H | R | T | E | F | T | P | U |
| E | H | E | Y | S | L | A | E | R |
| N | L | M | M | L | A | E | T | N |
| E | I | A | E | I | O | H | R | I |
| R | G | I | R | S | C | L | O | N |
| G | H | N | J | S | I | A | L | G |
| Y | T | S | M | O | K | E | L | U |
| N | E | R | I | F | U | E | L | Q |
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