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