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