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