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