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