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