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