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