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