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