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