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