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