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