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