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