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