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