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