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