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