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