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