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