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