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