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