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