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