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