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