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