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