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