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