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