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