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