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 | H | F |
| R | H | P | F | I | R | E | O | U |
| R | B | E | E | L | A | S | T | E |
| E | H | U | M | T | S | G | H | L |
| M | N | E | R | I | R | J | G | A |
| A | Z | E | L | N | C | O | I | O |
| I | N | S | R | L | I | A | L | C |
| N | Z | Y | W | G | F | N | L | X |
| S | M | O | K | E | Y | V | G | L |
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