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