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