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