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