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