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