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