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