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