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