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