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