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