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