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