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