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