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