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