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