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