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